LOCAL CLIMATOLOGICAL DATA Monthly Summary September 2026 Station: Blue Hill Meteorological Observatory 2 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| 30.15| 30.05|30.082| 5.0| 2.8|160| 17| S| 12|187| 58 | |02| 75.8 | 58.1 | 66.9 | 65.9 | 59| 80| 0| 2|.........| 0| 0.00| 0.0| 30.22| 30.10|30.168| 8.5| 7.5|115| 20|ESE| 14|115| 197 | |03| 74.8 | 61.2 | 68.0 | 67.5 | 65| 91| 0| 3|.........| 0| 0.47| 0.0| 30.11| 29.88|29.956| 6.6| 4.1|161| 27| S| 18|176| 110 | |04| 83.9*| 64.2 | 74.1 | 72.4 | 63| 76| 0| 9|.........| 0| 0.00| 0.0| 29.88| 29.79|29.824| 7.7| 7.5|332| 21| NW| 14|309| 225 | |05| 72.1 | 60.0 | 66.1 | 63.9 | 58| 81| 0| 1|.........| 0| 0.00| 0.0| 29.94| 29.78|29.856| 8.3| 5.5| 38| 24| E| 18| 85| 147 | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 69.3 | 53.6 | 61.5 | 60.2 | 56| 87| 3| 0|.........| 0| 0.29| 0.0| 30.04| 29.92|29.984| 6.3| 3.5|358| 24|NNE| 18| 69| 145 | |07| 79.5 | 52.8 | 66.2 | 65.6 | 53| 65| 0| 2|.........| 0| 0.00| 0.0| 30.16| 30.02|30.081|10.9|10.7|330| 26|WNW| 20|323| 251 | |08| 80.6 | 58.9 | 69.8 | 68.2 | 56| 66| 0| 5|.........| 0| 0.00| 0.0| 30.28| 30.15|30.206| 7.8| 4.7|313| 20| NW| 16|327| 211 | |09| 79.3 | 59.5 | 69.4 | 68.0 | 62| 82| 0| 5|.........| 0| 0.02| 0.0| 30.29| 29.89|30.157|11.7| 8.9|195| 39| S| 26|184| 143 | |10| 83.9 | 66.7 | 75.3*| 74.9 | 62| 65| 0| 11|.........| 0| 0.00| 0.0| 29.90| 29.76|29.819|16.2|14.1|271| 40|WNW| 31|291| 215 | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 77.6 | 58.5 | 68.1 | 67.4 | 51| 57| 0| 4|.........| 0| 0.00| 0.0| 30.08| 29.86|29.958| 9.1| 8.1|321| 20|WNW| 16|296| 237 | |12| 76.9 | 55.4 | 66.2 | 65.3 | 52| 64| 0| 1|.........| 0| 0.00| 0.0| 30.19| 30.08|30.135| 9.2| 4.9|169| 26| S| 18|187| 228 | |13| 67.1 | 61.2 | 64.2 | 64.9 | 63| 94| 1| 0|.........| 0| 0.97| 0.0| 30.10| 29.82|29.940|10.8| 6.9|169| 30| S| 21|174| 23 | |14| 72.4 | 53.1 | 62.8 | 64.9 | 54| 71| 2| 0|.........| 0| 0.00| 0.0| 30.26| 29.81|30.019|12.3|10.9|333| 29|NNW| 21|333| 221 | |15| 68.7 | 48.8*| 58.8 | 58.1 | 49| 72| 6| 0|.........| 0| 0.00| 0.0| 30.44| 30.25|30.378| 8.3| 4.3| 90| 21| S| 18|177| 239 | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 77.5 | 54.4 | 65.9 | 65.9 | 59| 79| 0| 1|.........| 0| 0.00| 0.0| 30.40| 30.29|30.336| 9.8| 9.0|233| 21| S| 15|240| 204 | |17| 81.9 | 64.4 | 73.2 | 71.1 | 65| 83| 0| 8|.........| 0| 0.03| 0.0| 30.30| 30.04|30.198| 8.0| 7.4|202| 29| S| 19|181| 158 | |18| 79.1 | 58.8 | 68.9 | 69.0 | 58| 71| 0| 4|.........| 0| 0.00| 0.0| 30.14| 30.02|30.059| 9.2| 8.0|345| 23| N| 16| 16| 215 | |19| 63.9 | 51.0 | 57.5 | 56.9 | 46| 66| 7| 0|.........| 0| 0.00| 0.0| 30.25| 30.14|30.211| 6.5| 4.3| 86| 18| N| 13| 24| 204 | |20| 60.8 | 52.6 | 56.7 | 57.2 | 52| 83| 8| 0|.........| 0| 0.10| 0.0| 30.22| 30.00|30.094| 7.7| 7.4|148| 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| 30.00|30.136| 9.3| 8.6| 58| 22| E| 16| 63| 198 | |22| 60.4 | 52.5 | 56.5*| 55.5 | 48| 76| 8| 0|.........| 0| 0.00| 0.0| 30.47| 30.24|30.377|10.1| 9.8| 67| 29|ENE| 20| 68| 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 | 2.17| 0.0| 30.47| 29.76|30.090| 9.1| 0.6|337| 40|WNW| 31|291| ---- | +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | 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|106.44| 0.0| 22 | 10 |------|----|----|---| 10 | 10 | 176| +------+------+------+------+---+----+----+----+------------+-----+-----+------+------+------+----+----+---+-------+-------+------+ | | 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 2 +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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|30.09| 0.00| 65| 61| 87|21| 8| 11| 0|30.15| 0.00| 58| 56| 91|08| 3| 5| 0|30.11| 0.00| 62| 58| 85|15| 9| 16| |03| 0|30.07| 0.00| 65| 61| 87|25| 7| 8| 0|30.16| 0.00| 61| 59| 94|06| 8| 12| 0|30.02| 0.00| 63| 59| 87|14| 11| 19| |06| 21|30.07| 0.00| 64| 62| 92|27| 3| 6| 14|30.19| 0.00| 62| 61| 97|08| 9| 13| 0|29.99| 0.00| 63| 62| 97|16| 13| 26| |09| 255|30.08| 0.04| 66| 64| 95|13| 3| 5| 482|30.20| 0.00| 68| 62| 79|10| 10| 14| 127|29.98| 0.00| 66| 65| 97|25| 5| 10| |12| 83|30.06| 0.00| 67| 64| 91|10| 8| 10| 763|30.19| 0.00| 74| 59| 60|11| 5| 14| 278|29.95| 0.00| 73| 69| 88|33| 3| 6| |15| 98|30.08| 0.00| 61| 59| 93|17| 4| 11| 239|30.17| 0.00| 73| 56| 56|13| 7| 13| 179|29.91| 0.00| 75| 69| 83|09| 3| 8| |18| 12|30.09| 0.00| 61| 59| 95|16| 2| 6| 12|30.17| 0.00| 66| 58| 76|12| 8| 15| 5|29.89| 0.00| 71| 67| 88|11| 6| 9| |21| 0|30.12| 0.00| 60| 59| 96|04| 2| 3| 0|30.14| 0.00| 63| 59| 88|15| 8| 14| 0|29.91| 0.00| 69| 67| 94|17| 8| 12| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 4 | SEP 5 | SEP 6 | | | | | |00| 0|29.88| 0.00| 69| 68| 96|27| 6| 11| 0|29.81| 0.00| 64| 58| 80|32| 10| 13| 0|29.94| 0.00| 60| 57| 91|35| 5| 8| |03| 0|29.83| 0.00| 66| 65| 97|31| 4| 10| 0|29.79| 0.00| 62| 57| 85|33| 8| 14| 0|29.93| 0.00| 60| 58| 95|05| 6| 9| |06| 30|29.84| 0.00| 64| 64| 97|31| 9| 12| 23|29.79| 0.00| 60| 57| 89|34| 11| 14| 21|29.97| 0.00| 57| 55| 95|03| 6| 9| |09| 599|29.84| 0.00| 74| 68| 83|33| 6| 10| 258|29.83| 0.00| 69| 61| 75|06| 7| 11| 116|30.00| 0.00| 62| 59| 88|04| 4| 11| |12| 840|29.81| 0.00| 83| 66| 58|00| 7| 15| 297|29.85| 0.00| 67| 60| 78|07| 12| 17| 142|30.00| 0.00| 65| 56| 73|07| 7| 11| |15| 336|29.80| 0.00| 83| 62| 49|32| 13| 18| 522|29.86| 0.00| 68| 60| 74|08| 12| 16| 297|29.98| 0.00| 67| 58| 73|27| 5| 8| |18| 16|29.80| 0.00| 76| 60| 58|33| 8| 16| 5|29.90| 0.00| 62| 56| 81|09| 8| 10| 7|29.99| 0.00| 59| 56| 89|24| 6| 8| |21| 0|29.82| 0.00| 69| 60| 74|34| 8| 13| 0|29.92| 0.00| 61| 56| 84|02| 3| 5| 0|30.01| 0.00| 57| 54| 89|31| 6| 9| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 7 | SEP 8 | SEP 9 | | | | | |00| 0|30.04| 0.00| 54| 50| 87|33| 11| 15| 0|30.16| 0.00| 61| 52| 71|32| 9| 15| 0|30.26| 0.00| 64| 58| 80|20| 5| 7| |03| 0|30.02| 0.00| 53| 50| 90|31| 13| 15| 0|30.16| 0.00| 59| 51| 75|31| 12| 14| 0|30.26| 0.00| 62| 58| 89|00| 9| 10| |06| 19|30.05| 0.00| 55| 50| 86|32| 15| 22| 30|30.18| 0.00| 60| 52| 76|29| 14| 17| 56|30.28| 0.00| 60| 56| 88|10| 3| 4| |09| 598|30.10| 0.00| 68| 56| 65|34| 10| 14| 589|30.22| 0.00| 73| 58| 60|31| 4| 12| 279|30.28| 0.00| 65| 59| 83|24| 0| 3| |12| 793|30.07| 0.00| 77| 54| 46|35| 14| 17| 401|30.20| 0.00| 78| 59| 52|33| 3| 16| 374|30.21| 0.00| 77| 64| 65|19| 12| 18| |15| 555|30.06| 0.00| 78| 53| 42|31| 11| 20| 649|30.20| 0.00| 79| 59| 51|09| 3| 10| 183|30.13| 0.00| 75| 65| 72|19| 16| 33| |18| 5|30.11| 0.00| 72| 52| 50|32| 10| 16| 0|30.23| 0.00| 70| 59| 69|13| 5| 7| 0|30.06| 0.00| 69| 66| 90|19| 19| 32| |21| 0|30.16| 0.00| 65| 52| 63|31| 9| 13| 0|30.27| 0.00| 66| 58| 75|16| 4| 7| 0|29.98| 0.00| 69| 67| 94|20| 20| 31| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 10 | SEP 11 | SEP 12 | | | | | |00| 0|29.90| 0.00| 70| 66| 86|20| 23| 34| 0|29.86| 0.00| 67| 53| 61|29| 13| 20| 0|30.08| 0.00| 59| 47| 65|00| 7| 9| |03| 0|29.84| 0.00| 71| 65| 81|23| 22| 35| 0|29.88| 0.00| 62| 52| 70|28| 12| 19| 0|30.10| 0.00| 57| 48| 72|02| 10| 11| |06| 37|29.83| 0.00| 69| 66| 90|24| 14| 23| 49|29.93| 0.00| 60| 53| 77|01| 8| 12| 21|30.16| 0.00| 57| 48| 72|08| 8| 10| |09| 587|29.83| 0.00| 76| 68| 77|28| 18| 26| 457|29.96| 0.00| 70| 54| 58|33| 8| 13| 592|30.18| 0.00| 67| 53| 61|16| 6| 11| |12| 700|29.79| 0.00| 82| 66| 58|29| 16| 29| 793|29.96| 0.00| 75| 52| 44|32| 13| 18| 780|30.16| 0.00| 75| 53| 46|19| 6| 14| |15| 522|29.77| 0.00| 82| 61| 49|29| 18| 34| 490|29.94| 0.00| 76| 52| 42|27| 10| 15| 339|30.14| 0.00| 76| 56| 49|22| 7| 14| |18| 5|29.79| 0.00| 77| 56| 48|29| 21| 31| 5|29.98| 0.00| 70| 48| 46|32| 11| 16| 0|30.11| 0.00| 68| 53| 60|18| 12| 20| |21| 0|29.84| 0.00| 71| 54| 54|29| 14| 22| 0|30.04| 0.00| 62| 47| 57|35| 11| 14| 0|30.13| 0.00| 62| 55| 78|18| 13| 23| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 13 | SEP 14 | SEP 15 | | | | | |00| 0|30.10| 0.00| 61| 57| 86|17| 16| 25| 0|29.83| 0.00| 66| 65| 98|26| 11| 17| 0|30.25| 0.00| 53| 45| 73|02| 9| 12| |03| 0|30.04| 0.00| 63| 60| 89|16| 12| 22| 0|29.84| 0.00| 65| 65| 98|29| 13| 18| 0|30.31| 0.00| 51| 45| 81|01| 6| 11| |06| 16|30.03| 0.00| 65| 62| 90|17| 19| 26| 7|29.90| 0.00| 64| 63| 98|31| 13| 18| 18|30.37| 0.00| 49| 45| 85|02| 10| 11| |09| 28|30.00| 0.00| 65| 62| 90|15| 12| 18| 582|29.98| 0.00| 66| 59| 80|34| 14| 20| 594|30.43| 0.00| 63| 50| 64|07| 10| 14| |12| 111|29.93| 0.17| 65| 64| 96|14| 14| 22| 784|30.01| 0.00| 71| 51| 49|35| 13| 25| 782|30.40| 0.00| 66| 49| 53|05| 3| 11| |15| 102|29.83| 0.04| 66| 65| 97|12| 9| 14| 485|30.03| 0.00| 71| 50| 46|32| 12| 21| 478|30.39| 0.00| 67| 53| 60|08| 7| 12| |18| 0|29.83| 0.00| 66| 65| 97|03| 3| 5| 0|30.13| 0.00| 63| 44| 51|35| 14| 20| 0|30.39| 0.00| 59| 51| 75|12| 11| 14| |21| 0|29.87| 0.00| 66| 65| 98|28| 10| 14| 0|30.22| 0.00| 58| 45| 61|01| 12| 19| 0|30.40| 0.00| 55| 50| 83|15| 7| 12| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 16 | SEP 17 | SEP 18 | | | | | |00| 0|30.39| 0.00| 55| 51| 86|20| 11| 13| 0|30.30| 0.00| 67| 62| 86|27| 9| 10| 0|30.04| 0.00| 68| 66| 96|24| 12| 18| |03| 0|30.36| 0.00| 55| 53| 93|20| 11| 15| 0|30.28| 0.00| 65| 62| 89|23| 3| 5| 0|30.03| 0.00| 65| 64| 96|00| 8| 11| |06| 47|30.37| 0.00| 56| 54| 92|24| 9| 13| 25|30.29| 0.00| 65| 62| 92|25| 0| 0| 30|30.04| 0.00| 63| 62| 96|35| 5| 8| |09| 548|30.37| 0.00| 66| 58| 77|23| 7| 15| 534|30.28| 0.00| 74| 66| 76|17| 0| 11| 636|30.07| 0.00| 72| 65| 79|34| 11| 18| |12| 679|30.33| 0.00| 75| 61| 61|25| 6| 13| 297|30.23| 0.00| 79| 67| 67|20| 4| 11| 751|30.05| 0.00| 78| 59| 52|33| 9| 16| |15| 461|30.30| 0.00| 77| 61| 58|25| 11| 17| 105|30.16| 0.00| 77| 68| 76|19| 9| 14| 482|30.03| 0.00| 78| 58| 50|33| 14| 20| |18| 5|30.29| 0.00| 71| 63| 77|19| 12| 19| 0|30.11| 0.00| 72| 67| 83|17| 10| 23| 0|30.06| 0.00| 69| 54| 59|34| 10| 14| |21| 0|30.32| 0.00| 66| 62| 87|27| 10| 14| 0|30.09| 0.00| 69| 66| 93|22| 13| 24| 0|30.11| 0.00| 63| 46| 54|00| 13| 18| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+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 | 1702 | 1701 | 1702 | 0340 | 0344 | 0356 | 0405 | 1133 | 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 2 +--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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|30.14| 0.00| 59| 45| 59|00| 9| 18| 0|30.22| 0.00| 53| 44| 72|16| 7| 14| 0|30.01| 0.06| 59| 58| 97|01| 5| 8| |03| 0|30.16| 0.00| 55| 45| 68|02| 8| 14| 0|30.19| 0.00| 53| 46| 76|15| 6| 9| 0|30.03| 0.00| 56| 55| 97|03| 12| 19| |06| 19|30.21| 0.00| 51| 44| 75|03| 8| 11| 18|30.16| 0.00| 54| 48| 81|14| 10| 14| 14|30.09| 0.00| 53| 53| 97|03| 6| 17| |09| 584|30.24| 0.00| 61| 47| 59|07| 7| 14| 139|30.15| 0.00| 58| 50| 74|16| 7| 12| 701|30.15| 0.00| 56| 54| 95|05| 8| 13| |12| 777|30.23| 0.00| 63| 46| 55|08| 7| 14| 246|30.10| 0.00| 61| 53| 76|16| 6| 13| 761|30.15| 0.00| 63| 53| 69|06| 12| 21| |15| 265|30.21| 0.00| 62| 47| 58|10| 7| 10| 77|30.03| 0.00| 60| 56| 86|15| 8| 20| 403|30.16| 0.00| 63| 51| 65|08| 8| 14| |18| 0|30.22| 0.00| 56| 47| 72|13| 9| 12| 0|30.01| 0.00| 58| 55| 88|14| 9| 17| 0|30.17| 0.00| 56| 51| 82|08| 11| 14| |21| 0|30.23| 0.00| 52| 46| 79|16| 5| 11| 0|30.00| 0.00| 58| 57| 96|12| 11| 15| 0|30.23| 0.00| 56| 51| 85|04| 5| 10| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | SEP 22 | SEP 23 | SEP 24 | | | | | |00| 0|30.25| 0.00| 54| 51| 88|02| 8| 11| 0|30.46| 0.00| 54| 47| 78|08| 14| 21| | | | | | | | | | |03| 0|30.27| 0.00| 54| 48| 81|04| 8| 18| | | | | | | | | | | | | | | | | | | |06| 0|30.32| 0.00| 55| 50| 82|06| 12| 22| | | | | | | | | | | | | | | | | | | |09| 309|30.38| 0.00| 56| 50| 79|06| 12| 24| | | | | | | | | | | | | | | | | | | |12| 772|30.41| 0.00| 59| 50| 72|08| 12| 27| | | | | | | | | | | | | | | | | | | |15| 441|30.40| 0.00| 59| 46| 63|07| 14| 24| | | | | | | | | | | | | | | | | | | |18| 0|30.43| 0.00| 53| 43| 68|07| 7| 18| | | | | | | | | | | | | | | | | | | |21| 0|30.45| 0.00| 53| 44| 71|08| 15| 21| | | | | | | | | | | | | | | | | | | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | 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|30.098| 61| 55| 83| 9.7| 27 | 2.4| |03| 0|30.072| 60| 56| 86| 9.6| 32 | 2.5| |06| 23|30.092| 59| 56| 88| 9.4| 35 | 2.0| |09| 436|30.116| 66| 59| 77| 7.7| 02 | 2.1| |12| 555|30.095| 71| 58| 64| 8.8| 04 | 2.1| |15| 350|30.072| 72| 58| 63| 9.5| 27 | 0.5| |18| 4|30.079| 66| 56| 73| 9.6| 16 | 1.4| |21| 0|30.103| 62| 55| 80| 9.5| 25 | 0.8| +--+----+------+---+---+---+-----+----+----+HOURLY PRECIPITATION (Water Equivalent)September 2026: Blue Hill Meteorological Observatory 2 ---+-----------------------------------------------------------+-----------------------------------------------------------+--- | | | 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| | |0.12|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|0.12|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.)