LOCAL CLIMATOLOGICAL DATA Monthly Summary September 2026 Station: Blue Hill Meteorological Observatory Latitude: 42° 12' 44" N Longitude: 71° 06' 53" W Elevation (ground): 635 feet Time Zone: Eastern +--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+ | | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind |Solar | | +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+ | | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak |2Minute| Mean | | | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ W | | | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | a | | D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | t | | a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | t | | t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | s | | e| m | m | e | n | t | n | g | g |8 smk, hz| r| v | w | x | n | n | d | d | r | d | r | d | r | m² | | | | | | | | | | |9 blw snw| | | | | | | | | | | | | | | | 1| 2 | 3 | 4A | 4B | 5 | 6 | 7 | 8 | 9 |10| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18| 19| 20| 21| 22| 23 | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |01| 69.1 | 57.8 | 63.4 | 63.4 | 61| 92| 1| 0|.........| 0| 0.19| 0.0| 30.16| 30.05|30.091| 5.1| 2.9|154| 15| E| 12|100| 58 | |02| 75.8 | 58.1 | 66.9 | 65.9 | 59| 80| 0| 2|.........| 0| 0.00| 0.0| 30.23| 30.11|30.173| 8.8| 7.7|109| 20|ESE| 15|110| 197 | |03| 74.8 | 61.2 | 68.0 | 67.5 | 65| 91| 0| 3|.........| 0| 0.47| 0.0| 30.12| 29.88|29.962| 7.0| 4.0|160| 22|SSE| 16|152| 111 | |04| 83.9*| 64.2 | 74.1 | 72.4 | 63| 76| 0| 9|.........| 0| 0.00| 0.0| 29.88| 29.79|29.829| 8.5| 8.3|319| 22|NNW| 15|318| 226 | |05| 72.1 | 60.0 | 66.1 | 63.9 | 58| 81| 0| 1|.........| 0| 0.00| 0.0| 29.94| 29.79|29.861| 8.9| 5.3| 29| 23| E| 17| 82| 146 | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 69.3 | 53.6 | 61.5 | 60.2 | 56| 87| 3| 0|.........| 0| 0.27| 0.0| 30.05| 29.93|29.992| 6.4| 3.5|344| 23| NE| 18| 65| 148 | |07| 79.5 | 52.8 | 66.2 | 65.6 | 53| 65| 0| 2|.........| 0| 0.00| 0.0| 30.17| 30.04|30.089|11.7|11.6|317| 28|WNW| 19|287| 248 | |08| 80.6 | 58.9 | 69.8 | 68.2 | 56| 66| 0| 5|.........| 0| 0.00| 0.0| 30.28| 30.16|30.209| 8.3| 4.9|300| 22|WNW| 15|328| 214 | |09| 79.3 | 59.5 | 69.4 | 68.0 | 62| 82| 0| 5|.........| 0| 0.02| 0.0| 30.30| 29.90|30.161|10.6| 7.6|192| 36| S| 24|187| 145 | |10| 83.9 | 66.7 | 75.3*| 74.9 | 62| 65| 0| 11|.........| 0| 0.00| 0.0| 29.90| 29.76|29.822|17.7|15.9|264| 44| W| 31|278| 217 | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 77.6 | 58.5 | 68.1 | 67.4 | 51| 57| 0| 4|.........| 0| 0.00| 0.0| 30.09| 29.86|29.963| 9.7| 8.8|309| 22|WNW| 16|282| 238 | |12| 76.9 | 55.4 | 66.2 | 65.3 | 52| 64| 0| 1|.........| 0| 0.00| 0.0| 30.20| 30.08|30.143| 8.3| 3.8|163| 24| S| 15|190| 228 | |13| 67.1 | 61.2 | 64.2 | 64.9 | 63| 94| 1| 0|.........| 0| 0.97| 0.0| 30.11| 29.82|29.943|10.0| 5.9|167| 24| S| 16|149| 23 | |14| 72.4 | 53.1 | 62.8 | 64.9 | 54| 71| 2| 0|.........| 0| 0.00| 0.0| 30.26| 29.81|30.023|12.8|11.5|321| 31|WNW| 21|328| 221 | |15| 68.7 | 48.8*| 58.8 | 58.1 | 49| 72| 6| 0|.........| 0| 0.00| 0.0| 30.44| 30.26|30.381| 8.4| 4.4| 80| 18| SE| 13|191| 239 | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 77.5 | 54.4 | 65.9 | 65.9 | 59| 79| 0| 1|.........| 0| 0.00| 0.0| 30.40| 30.29|30.340| 9.7| 9.0|228| 21| S| 15|232| 204 | |17| 81.9 | 64.4 | 73.2 | 71.1 | 65| 83| 0| 8|.........| 0| 0.03| 0.0| 30.30| 30.04|30.202| 7.9| 7.1|202| 26| S| 17|186| 157 | |18| 79.1 | 58.8 | 68.9 | 69.0 | 58| 71| 0| 4|.........| 0| 0.00| 0.0| 30.15| 30.03|30.063| 9.7| 8.6|331| 25|NNW| 16|316| 215 | |19| 63.9 | 51.0 | 57.5 | 56.9 | 46| 66| 7| 0|.........| 0| 0.00| 0.0| 30.26| 30.15|30.216| 7.5| 4.6| 78| 17| N| 13| 13| 204 | |20| 60.8 | 52.6 | 56.7 | 57.2 | 52| 83| 8| 0|.........| 0| 0.10| 0.0| 30.23| 30.01|30.102| 7.5| 7.4|146| 20| S| 14|150| 61 | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 63.9 | 52.3 | 58.1 | 57.4 | 53| 85| 7| 0|.........| 0| 0.10| 0.0| 30.25| 30.02|30.140| 9.5| 8.6| 50| 22|ENE| 17| 80| 199 | |22| 60.4 | 52.5 | 56.5*| 55.5 | 48| 76| 8| 0|.........| 0| 0.00| 0.0| 30.48| 30.25|30.382|13.0|12.5| 63| 32| NE| 21| 67| 191 | |23| | | | | | | | | | | | | | | | | | | | | | | | |24| | | | | | | | | | | | | | | | | | | | | | | | |25| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |26| | | | | | | | | | | | | | | | | | | | | | | | |27| | | | | | | | | | | | | | | | | | | | | | | | |28| | | | | | | | | | | | | | | | | | | | | | | | |29| | | | | | | | | | | | | | | | | | | | | | | | |30| | | | | | | | | | | | | | | | | | | | | | | | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |1618.5|1255.8|------|------|---|----| 43| 56| Days | 2.15| 0.0| 30.48| 29.76|30.095| 9.4| 1.0|305| 44| W| 31|278| ---- | +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 73.6| 57.1| 65.3 | 64.7 | 57|76.7|----|----|≥.01 Inch 8|106.10| 0.0| 22 | 10 |------|----|----|---| 10 | 10 | 177| +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+-------+-------+------+ | | Season |Snow, Ice | | | | Number of Days | to Date |≥1.0 Inch 0| Greatest in 24 Hours and Dates | Greatest Depth on Ground | +------------------+-----------------+----+----+------------+--------------+-----------------+ of Snow, Ice Pellets or Ice | | Max Temperature | Min Temperature | 45| 841|Thunder 0|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 0| 0.97| 13 | 0.0 | - | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 0 | 0 | 0 | 0 |----|----| Clear 0 Partly Cloudy 0 Cloudy 0 | +--------+---------+--------+--------+----+----+------------------------------------------+ NOTES: Units: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches. Column 4A: value is (MAX+MIN) / 2. Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean. Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours. Columns 7, 8: Degree Days heating base is 65°F, cooling base is 65°F. Data in columns 9, 10, 12 are entered manually by the station observer. Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations.OBSERVATIONS AT 3-HOUR INTERVALS September 2026: Blue Hill Meteorological Observatory +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind | | | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | | H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | | o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | | u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | | r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 1 | SEP 2 | SEP 3 | | | | | |00| 0|30.10| 0.00| 65| 61| 87|20| 8| 11| 0|30.16| 0.00| 58| 56| 91|09| 4| 6| 0|30.12| 0.00| 62| 58| 85|14| 11| 17| |03| 0|30.08| 0.00| 65| 61| 87|24| 5| 7| 0|30.17| 0.00| 61| 59| 94|05| 9| 11| 0|30.03| 0.00| 63| 59| 87|14| 13| 18| |06| 21|30.08| 0.00| 64| 62| 92|25| 5| 5| 14|30.19| 0.00| 62| 61| 97|08| 8| 13| 5|29.99| 0.00| 63| 62| 97|16| 13| 18| |09| 255|30.08| 0.04| 66| 64| 95|11| 4| 6| 563|30.20| 0.00| 68| 62| 79|09| 9| 14| 130|29.98| 0.00| 66| 65| 97|24| 5| 9| |12| 83|30.06| 0.00| 67| 64| 91|10| 10| 12| 763|30.19| 0.00| 74| 59| 59|10| 7| 13| 278|29.95| 0.00| 73| 69| 88|00| 3| 8| |15| 98|30.08| 0.00| 61| 59| 93|17| 5| 9| 239|30.17| 0.00| 73| 56| 56|12| 8| 15| 179|29.92| 0.00| 75| 69| 83|07| 4| 9| |18| 12|30.10| 0.00| 61| 59| 95|16| 2| 6| 12|30.17| 0.00| 66| 58| 76|12| 8| 13| 5|29.90| 0.00| 71| 67| 88|11| 7| 9| |21| 0|30.13| 0.00| 60| 59| 96|07| 2| 3| 0|30.14| 0.00| 63| 59| 88|15| 10| 16| 0|29.92| 0.00| 69| 67| 94|17| 6| 8| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 4 | SEP 5 | SEP 6 | | | | | |00| 0|29.88| 0.00| 69| 68| 96|26| 8| 12| 0|29.82| 0.00| 64| 58| 80|30| 10| 13| 0|29.94| 0.00| 60| 57| 91|33| 6| 8| |03| 0|29.84| 0.00| 66| 65| 97|30| 7| 11| 0|29.80| 0.00| 62| 57| 85|31| 11| 14| 0|29.94| 0.00| 60| 58| 95|04| 6| 10| |06| 26|29.85| 0.00| 64| 64| 97|30| 9| 11| 23|29.80| 0.00| 60| 57| 89|32| 11| 15| 21|29.98| 0.00| 57| 55| 95|02| 7| 9| |09| 599|29.85| 0.00| 74| 68| 83|31| 8| 11| 211|29.84| 0.00| 69| 61| 75|05| 7| 12| 116|30.02| 0.00| 62| 59| 88|03| 4| 12| |12| 838|29.82| 0.00| 83| 66| 58|34| 8| 17| 297|29.85| 0.00| 67| 60| 78|07| 12| 18| 142|30.00| 0.00| 65| 56| 73|06| 7| 11| |15| 336|29.80| 0.00| 83| 62| 49|31| 12| 21| 522|29.86| 0.00| 68| 60| 74|08| 12| 18| 297|29.98| 0.00| 67| 58| 73|26| 6| 9| |18| 16|29.81| 0.00| 76| 60| 58|32| 10| 15| 0|29.90| 0.00| 62| 56| 81|09| 8| 10| 7|30.00| 0.00| 59| 56| 89|23| 7| 8| |21| 0|29.82| 0.00| 69| 60| 74|33| 9| 12| 0|29.93| 0.00| 61| 56| 84|01| 3| 4| 0|30.02| 0.00| 57| 54| 89|29| 5| 9| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 7 | SEP 8 | SEP 9 | | | | | |00| 0|30.05| 0.00| 54| 50| 87|31| 13| 16| 0|30.17| 0.00| 61| 52| 71|30| 10| 14| 0|30.26| 0.00| 64| 58| 80|19| 5| 7| |03| 0|30.04| 0.00| 53| 50| 90|30| 13| 15| 0|30.16| 0.00| 59| 51| 75|29| 11| 15| 0|30.26| 0.00| 62| 58| 89|34| 9| 11| |06| 19|30.06| 0.00| 55| 50| 86|31| 16| 22| 30|30.18| 0.00| 60| 52| 76|28| 12| 17| 56|30.28| 0.00| 60| 56| 88|09| 4| 5| |09| 598|30.10| 0.00| 68| 56| 65|33| 10| 16| 589|30.22| 0.00| 73| 58| 60|30| 6| 13| 279|30.28| 0.00| 65| 59| 83|06| 0| 2| |12| 793|30.08| 0.00| 77| 54| 46|33| 16| 20| 935|30.20| 0.00| 78| 59| 52|31| 7| 17| 554|30.21| 0.00| 77| 64| 65|18| 11| 19| |15| 555|30.06| 0.00| 78| 53| 42|30| 10| 21| 649|30.20| 0.00| 79| 59| 51|08| 6| 11| 190|30.14| 0.00| 75| 65| 72|19| 14| 28| |18| 5|30.11| 0.00| 72| 52| 50|31| 11| 18| 0|30.23| 0.00| 70| 59| 69|13| 4| 5| 0|30.06| 0.00| 69| 66| 90|19| 15| 24| |21| 0|30.16| 0.00| 65| 52| 63|30| 8| 14| 0|30.27| 0.00| 66| 58| 75|17| 5| 7| 0|29.99| 0.00| 69| 67| 94|19| 17| 30| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 10 | SEP 11 | SEP 12 | | | | | |00| 0|29.90| 0.00| 70| 66| 86|20| 21| 31| 0|29.87| 0.00| 67| 53| 61|28| 13| 22| 0|30.09| 0.00| 59| 47| 65|34| 8| 9| |03| 0|29.85| 0.00| 71| 65| 81|22| 20| 35| 0|29.89| 0.00| 62| 52| 70|27| 13| 17| 0|30.11| 0.00| 57| 48| 72|01| 10| 11| |06| 37|29.83| 0.00| 69| 66| 90|24| 13| 21| 49|29.94| 0.00| 60| 53| 77|35| 10| 13| 21|30.17| 0.00| 57| 48| 72|07| 7| 10| |09| 584|29.83| 0.00| 76| 68| 77|27| 18| 28| 457|29.97| 0.00| 70| 54| 58|32| 9| 13| 592|30.19| 0.00| 67| 53| 61|17| 5| 9| |12| 700|29.79| 0.00| 82| 66| 58|28| 15| 29| 793|29.96| 0.00| 75| 52| 44|30| 12| 21| 780|30.17| 0.00| 75| 53| 46|18| 6| 12| |15| 522|29.77| 0.00| 82| 61| 49|28| 17| 35| 490|29.95| 0.00| 76| 52| 42|26| 11| 16| 411|30.14| 0.00| 76| 56| 49|21| 7| 12| |18| 5|29.78| 0.00| 77| 56| 48|27| 21| 33| 5|29.98| 0.00| 70| 48| 46|31| 11| 16| 0|30.12| 0.00| 68| 53| 60|18| 10| 21| |21| 0|29.85| 0.00| 71| 54| 54|29| 14| 20| 0|30.05| 0.00| 62| 47| 57|34| 12| 14| 0|30.15| 0.00| 62| 55| 78|18| 12| 18| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 13 | SEP 14 | SEP 15 | | | | | |00| 0|30.11| 0.00| 61| 57| 86|17| 12| 20| 0|29.83| 0.00| 66| 65| 98|25| 14| 17| 0|30.26| 0.00| 53| 45| 73|01| 10| 14| |03| 0|30.05| 0.00| 63| 60| 89|16| 12| 17| 0|29.85| 0.00| 65| 65| 98|28| 13| 16| 0|30.31| 0.00| 51| 45| 81|35| 7| 11| |06| 16|30.03| 0.00| 65| 62| 90|17| 13| 20| 7|29.90| 0.00| 64| 63| 98|30| 12| 18| 18|30.37| 0.00| 49| 45| 85|01| 10| 11| |09| 28|30.00| 0.00| 65| 62| 90|15| 15| 21| 582|29.99| 0.00| 66| 59| 80|33| 14| 24| 598|30.43| 0.00| 63| 50| 64|06| 10| 14| |12| 111|29.94| 0.17| 65| 64| 96|14| 14| 19| 784|30.01| 0.00| 71| 51| 49|33| 15| 27| 782|30.40| 0.00| 66| 49| 53|04| 4| 12| |15| 102|29.83| 0.04| 66| 65| 97|11| 9| 15| 485|30.03| 0.00| 71| 50| 46|30| 11| 20| 478|30.39| 0.00| 67| 53| 60|07| 8| 12| |18| 0|29.83| 0.00| 66| 65| 97|34| 3| 6| 0|30.14| 0.00| 63| 44| 51|34| 15| 21| 0|30.39| 0.00| 59| 51| 75|12| 10| 13| |21| 0|29.88| 0.00| 66| 65| 98|27| 12| 14| 0|30.22| 0.00| 58| 45| 61|00| 14| 20| 0|30.40| 0.00| 55| 50| 83|15| 11| 16| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 16 | SEP 17 | SEP 18 | | | | | |00| 0|30.40| 0.00| 55| 51| 86|19| 11| 13| 0|30.30| 0.00| 67| 62| 86|26| 10| 11| 0|30.04| 0.00| 68| 66| 96|23| 11| 18| |03| 0|30.37| 0.00| 55| 53| 93|20| 11| 14| 0|30.28| 0.00| 65| 62| 89|23| 5| 6| 0|30.03| 0.00| 65| 64| 96|35| 7| 12| |06| 47|30.37| 0.00| 56| 54| 92|24| 10| 14| 25|30.29| 0.00| 65| 62| 92|24| 4| 5| 30|30.05| 0.00| 63| 62| 96|34| 5| 8| |09| 548|30.37| 0.00| 66| 58| 77|22| 7| 14| 534|30.28| 0.00| 74| 66| 76|17| 4| 9| 636|30.08| 0.00| 71| 65| 79|33| 12| 17| |12| 679|30.34| 0.00| 75| 61| 61|25| 7| 13| 297|30.23| 0.00| 79| 67| 68|17| 4| 11| 751|30.05| 0.00| 78| 59| 52|31| 10| 17| |15| 461|30.30| 0.00| 77| 61| 58|24| 10| 15| 105|30.16| 0.00| 77| 68| 76|19| 8| 16| 482|30.03| 0.00| 78| 58| 50|31| 15| 23| |18| 5|30.30| 0.00| 71| 63| 77|19| 11| 19| 0|30.12| 0.00| 72| 67| 83|17| 11| 21| 0|30.06| 0.00| 69| 54| 59|33| 9| 14| |21| 0|30.32| 0.00| 66| 62| 87|26| 12| 16| 0|30.10| 0.00| 69| 66| 93|21| 12| 22| 0|30.13| 0.00| 63| 46| 54|34| 11| 19| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+MAXIMUM SHORT DURATION PRECIPITATION +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Precipitation | 0.11 | 0.16 | 0.18 | 0.22 | 0.27 | 0.30 | 0.31 | 0.39 | 0.47 | 0.54 | 0.60 | 0.67 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 06 | 06 | 06 | 03 | 03 | 03 | 03 | 13 | 13 | 13 | 13 | 13 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1703 | 1701 | 1703 | 0340 | 0344 | 0355 | 0405 | 1126 | 1150 | 1153 | 1207 | 1242 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ The precipitation amounts for the indicated time intervals may occur at any time during the month. The time indicated is the ending time of the interval. Date and time are not entered for trace amounts.OBSERVATIONS AT 3-HOUR INTERVALS September 2026: Blue Hill Meteorological Observatory +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind | | | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | | | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | | H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | | o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | | u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | | r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 19 | SEP 20 | SEP 21 | | | | | |00| 0|30.15| 0.00| 59| 45| 59|34| 12| 18| 0|30.23| 0.00| 53| 44| 72|16| 7| 9| 0|30.02| 0.06| 59| 58| 97|35| 5| 8| |03| 0|30.17| 0.00| 55| 45| 68|00| 9| 13| 0|30.20| 0.00| 53| 46| 76|14| 7| 9| 0|30.03| 0.00| 56| 55| 97|03| 12| 19| |06| 19|30.22| 0.00| 51| 44| 75|02| 9| 11| 18|30.16| 0.00| 54| 48| 81|14| 10| 14| 14|30.09| 0.00| 53| 53| 97|02| 6| 16| |09| 584|30.25| 0.00| 61| 47| 59|07| 5| 14| 139|30.15| 0.00| 58| 50| 74|15| 7| 13| 701|30.15| 0.00| 56| 54| 95|04| 7| 13| |12| 777|30.23| 0.00| 63| 46| 55|07| 8| 13| 246|30.11| 0.00| 61| 53| 76|14| 7| 12| 761|30.15| 0.00| 63| 53| 69|07| 13| 20| |15| 265|30.21| 0.00| 62| 47| 58|09| 8| 10| 77|30.04| 0.00| 60| 55| 86|15| 9| 18| 403|30.16| 0.00| 63| 51| 65|07| 8| 14| |18| 0|30.22| 0.00| 56| 47| 72|13| 8| 10| 0|30.02| 0.00| 58| 55| 88|14| 7| 14| 0|30.17| 0.00| 56| 51| 82|08| 11| 15| |21| 0|30.24| 0.00| 52| 46| 79|15| 8| 10| 0|30.01| 0.00| 58| 57| 96|11| 9| 13| 0|30.23| 0.00| 56| 51| 85|03| 6| 9| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 22 | SEP 23 | SEP 24 | | | | | |00| 0|30.25| 0.00| 54| 51| 88|01| 8| 11| 0|30.47| 0.00| 54| 47| 78|07| 15| 21| | | | | | | | | | |03| 0|30.28| 0.00| 54| 48| 82|03| 10| 19| | | | | | | | | | | | | | | | | | | |06| 0|30.32| 0.00| 55| 50| 82|06| 13| 23| | | | | | | | | | | | | | | | | | | |09| 309|30.39| 0.00| 56| 50| 79|06| 15| 25| | | | | | | | | | | | | | | | | | | |12| 772|30.41| 0.00| 59| 51| 73|07| 16| 27| | | | | | | | | | | | | | | | | | | |15| 441|30.41| 0.00| 59| 46| 63|07| 15| 26| | | | | | | | | | | | | | | | | | | |18| 0|30.43| 0.00| 53| 43| 68|07| 12| 20| | | | | | | | | | | | | | | | | | | |21| 0|30.46| 0.00| 53| 44| 71|08| 15| 23| | | | | | | | | | | | | | | | | | | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 25 | SEP 26 | SEP 27 | | | | | |00| | | | | | | | | | | | | | | | | | | | | | | | | | | | |03| | | | | | | | | | | | | | | | | | | | | | | | | | | | |06| | | | | | | | | | | | | | | | | | | | | | | | | | | | |09| | | | | | | | | | | | | | | | | | | | | | | | | | | | |12| | | | | | | | | | | | | | | | | | | | | | | | | | | | |15| | | | | | | | | | | | | | | | | | | | | | | | | | | | |18| | | | | | | | | | | | | | | | | | | | | | | | | | | | |21| | | | | | | | | | | | | | | | | | | | | | | | | | | | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 28 | SEP 29 | SEP 30 | | | | | |00| | | | | | | | | | | | | | | | | | | | | | | | | | | | |03| | | | | | | | | | | | | | | | | | | | | | | | | | | | |06| | | | | | | | | | | | | | | | | | | | | | | | | | | | |09| | | | | | | | | | | | | | | | | | | | | | | | | | | | |12| | | | | | | | | | | | | | | | | | | | | | | | | | | | |15| | | | | | | | | | | | | | | | | | | | | | | | | | | | |18| | | | | | | | | | | | | | | | | | | | | | | | | | | | |21| | | | | | | | | | | | | | | | | | | | | | | | | | | | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +------------------------------------------+---------------------------------------+---------------------------------------+WEATHER NOTES SUMMARY BY HOURS +--+-----------------------------+---------+ Wind Direction: Directions are those from which the wind is blowing, | | Averages | | indicated in tens of degrees from true North: i.e., 09 for East, 18 for | +----+------+---+---+---+-----+Resultant| South, 27 for West, and 00 or 36 for North. | | | | | | | | | Wind Speed: The observed one-minute average speed in miles-per-hour. | | | | T | | | | Wind | Wind Gust: The maximum instantaneous wind speed for the ten minute-period | | | | e | | % | W +----+----+ preceding the observation. | | | | m | D | | i | D | | Rainfall Rate: The instantaneous rainfall rate at time of observation, | | S | P | p | e | H | n | i | | calculated by timing consecutive pulses from the electronic rain | | u | r | e | w | u | d | r | | gauge and interpolating this rate for one hour. | | n | e | r | | m | | e | | | | s | s | a | P | i | S | c | S | | H| h | s | t | o | d | p | t | p | | o| i | u | u | i | i | e | i | e | | u| n | r | r | n | t | e | o | e | | r| e | e | e | t | y | d | n | d | +--+----+------+---+---+---+-----+----+----+ |00| 0|30.106| 61| 55| 83| 10.0| 27 | 3.1| |03| 0|30.080| 60| 56| 86| 10.0| 31 | 2.9| |06| 23|30.098| 59| 56| 88| 9.4| 33 | 2.3| |09| 438|30.120| 66| 59| 77| 8.2| 01 | 1.6| |12| 587|30.098| 71| 58| 64| 9.6| 03 | 2.1| |15| 354|30.074| 72| 58| 63| 9.6| 23 | 0.5| |18| 3|30.083| 66| 56| 73| 9.6| 17 | 0.9| |21| 0|30.109| 62| 55| 80| 9.7| 25 | 1.4| +--+----+------+---+---+---+-----+----+----+HOURLY PRECIPITATION (Water Equivalent)September 2026: Blue Hill Meteorological Observatory ---+-----------------------------------------------------------+-----------------------------------------------------------+--- | | | D| A.M. Hour Ending at | P.M. Hour Ending at |D a| | |a t+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+t e| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |e ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- 01| | | | | | | |0.03|0.03|0.01| | |0.07|0.02|0.03| | | | | | | | | |01 02| | | | | | | | | | | | | | | | | | | | | | | | |02 03| | | |0.30|0.09|0.02|0.06| | | | | | | | | | | | | | | | | |03 04| | | | | | | | | | | | | | | | | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | |0.01|0.03|0.03|0.02|0.01| | | | | | |0.01| | |0.10|0.06| | | | | | |06 07| | | | | | | | | | | | | | | | | | | | | | | | |07 08| | | | | | | | | | | | | | | | | | | | | | | | |08 09| | | | | | | | | | | | | | | | | | |0.01|0.01| | | | |09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | | | | | | | | | | | | | | | | | | | | | | | |12 13| | | | | | | | | |0.09|0.28|0.26|0.12|0.16|0.05|0.01| | | | | | | | |13 14| | | | | | | | | | | | | | | | | | | | | | | | |14 15| | | | | | | | | | | | | | | | | | | | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | | | | | |16 17| | | | | | | | | | | | | | | | | | | | | |0.03| | |17 18| | | | | | | | | | | | | | | | | | | | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | |0.01| |0.03|0.06|20 | | | | | | | | | | | | | | | | | | | | | | | | | 21|0.03|0.03|0.02| |0.01|0.01| | | | | | | | | | | | | | | | | | |21 22| | | | | | | | | | | | | | | | | | | | | | | | |22 23| | | | | | | | | | | | | | | | | | | | | | | | |23 24| | | | | | | | | | | | | | | | | | | | | | | | |24 25| | | | | | | | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | | | | | | | | | | | | | | | | | | | | | | |28 29| | | | | | | | | | | | | | | | | | | | | | | | |29 30| | | | | | | | | | | | | | | | | | | | | | | | |30 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum|0.03|0.03|0.03|0.33|0.13|0.05|0.07|0.03|0.03|0.10|0.28|0.26|0.19|0.19|0.08|0.01|0.10|0.06|0.01|0.01|0.01|0.03|0.03|0.06|Sum ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- During a frozen precipitation event, hourly precipitation totals may not be recorded. In this case, daily amounts are typically entered in the last column (hour ending at 12 A.M.)