LOCAL CLIMATOLOGICAL DATA Hourly Summary May 18, 2026 Station: Blue Hill Meteorological Observatory 2 Latitude: 42° 12' 44" N Longitude: 71° 06' 53" W Elevation (ground): 635 ft. Time Zone: Eastern +--+------------------------+----+-----+--------------------+------------------------+------+ | | Temperature | | Pre-| Pressure | Wind |Solar | | +------+------+------+---+ Hu-|cipi-| Adj. to Sea Level +----+---+-------+-------+------+ | | M | M | | |mid-| ta- +------+------+------+ Avg|Res| Peak |2Minute| Mean | | | a | i | | D | ity| tion| | | | | +---+---+---+---+ W | | | x | n | | e | | | | | | S | | S | | S | | a | | H| i | i | M | w | M | | | | M | p | | p | | p | | t | | o| m | m | e | | e |Water| M | M | e | e | D | e | D | e | D | t | | u| u | u | a | P | a | | a | i | a | e | i | e | i | e | i | s | | r| m | m | n | t | n |Equiv| x | n | n | d | r | d | r | d | r | m² | | | | | | | | | | | | | | | | | | | | 1| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12| 13| 14| 15| 16| 17 | +--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+ |00| 70.3 | 69.0 | 69.9 | 53| 55| 0.00| 30.13| 30.11|30.120|12.7| 47| 20| NE| 15| 49| 0 | |01| 69.0 | 66.1 | 67.4 | 51| 56| 0.00| 30.14| 30.13|30.132|14.1| 80| 23| E| 17| 82| 0 | |02| 66.1 | 64.1 | 65.3 | 47| 52| 0.00| 30.16| 30.13|30.146|15.0| 86| 25| E| 19| 81| 0 | |03| 64.5 | 64.0 | 64.3 | 45| 50| 0.00| 30.17| 30.15|30.160|14.4| 91| 20| E| 16| 86| 0 | | | | | | | | | | | | | | | | | | | |04| 64.5 | 62.7 | 63.5 | 46| 52| 0.00| 30.19| 30.17|30.179|12.8|107| 19|ESE| 14|100| 9 | |05| 63.0 | 62.4*| 62.7 | 46| 54| 0.00| 30.22| 30.19|30.205|12.4|114| 19|ESE| 15|110| 43 | |06| 65.4 | 63.0 | 64.0 | 48| 55| 0.00| 30.23| 30.21|30.219|12.4|128| 23|ESE| 15|128| 267 | |07| 69.9 | 65.4 | 67.9 | 48| 50| 0.00| 30.25| 30.23|30.240|10.1|128| 18|ESE| 15|134| 457 | | | | | | | | | | | | | | | | | | | |08| 73.6 | 69.8 | 71.2 | 49| 45| 0.00| 30.25| 30.23|30.241| 8.5|130| 18| SE| 13|138| 617 | |09| 76.2 | 73.3 | 74.8 | 50| 42| 0.00| 30.24| 30.23|30.238| 5.2|150| 15| S| 9|181| 771 | |10| 79.2 | 76.0 | 77.9 | 52| 41| 0.00| 30.24| 30.21|30.230| 5.5|158| 12| SE| 9|133| 842 | |11| 81.1 | 78.5 | 79.8 | 53| 39| 0.00| 30.22| 30.19|30.205| 7.1|163| 21| S| 13|166| 878 | | | | | | | | | | | | | | | | | | | |12| 83.0 | 80.6 | 82.0 | 53| 36| 0.00| 30.19| 30.17|30.183| 8.0|180| 22| S| 14|170| 852 | |13| 83.7 | 82.5 | 83.1 | 54| 36| 0.00| 30.17| 30.15|30.162| 9.2|184| 18| S| 13|183| 784 | |14| 83.4 | 82.3 | 82.8 | 55| 38| 0.00| 30.16| 30.13|30.146| 9.2|174| 24| S| 13|167| 667 | |15| 84.6 | 82.6 | 83.5 | 58| 42| 0.00| 30.14| 30.12|30.124|11.6|182| 26| S| 17|179| 533 | | | | | | | | | | | | | | | | | | | |16| 84.8*| 81.5 | 83.5 | 62| 49| 0.00| 30.12| 30.09|30.108|14.9|195| 32| S| 23|183| 358 | |17| 81.5 | 78.0 | 79.8 | 63| 56| 0.00| 30.09| 30.08|30.090|18.9|202| 35| S| 24|200| 157 | |18| 78.0 | 74.0 | 75.9 | 62| 62| 0.00| 30.09| 30.09|30.090|16.9|201| 28| S| 21|209| 22 | |19| 74.1 | 71.9 | 73.0 | 62| 68| 0.00| 30.10| 30.08|30.090|15.9|206| 28| S| 19|205| 0 | | | | | | | | | | | | | | | | | | | |20| 71.9 | 70.5 | 71.0 | 61| 71| 0.00| 30.11| 30.10|30.110|16.4|213| 25| N| 19|220| 0 | |21| 70.6 | 69.5 | 70.1 | 61| 73| 0.00| 30.11| 30.10|30.107|15.6|217| 24| SW| 18|218| 0 | |22| 69.5 | 68.5 | 69.0 | 61| 75| 0.00| 30.11| 30.10|30.106|16.3|220| 24| SW| 18|226| 0 | |23| 68.7 | 68.3 | 68.5 | 61| 77| 0.00| 30.11| 30.10|30.102|16.7|223| 24| SW| 19|223| 0 | +--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+ | ---- | ---- | ---- | - | -- |Total| For the day: | ---- | +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+ | ---- | ---- | ---- | - | -- | 0.00| 30.25| 30.08|30.155|12.5|167| 35| S| 24|200| ---- | +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+ | Avg | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - | Hour | Hour | Avg | +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+ | 73.6 | 72.9 | 54|53.2| 0.96| 8 | 17+ | ---- | -- | - | 17 | 17 | 302.4| +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+ | Total Snow, | | | | Heat 0| | Ice Pellets | Greatest Depth on Ground | Precip Types|Degree+----------+ | 0.0 | of Snow, Ice Pellets or Ice 0 | ......... | Days | Cool 9| +--------------------+-----------------------------------+-------------+------+----------+ NOTES: Data in columns 4, 5, 6, 10, 11, 17 are means via continuous observations for each hour. Units: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches. Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for each hour. Column 12: Resultant wind is calculated by the vector sum of continuous wind observations. Precipitation types: 1 FOG, 2 HEAVY FOG, 3 THUNDER, 4 ICE PELLETS, 5 HAIL, 6 GLAZE, 7 DUSTSTORM, 8 SMOKE/HAZE, 9 BLOWING SNOW. Degree Days heating base is 65°F, cooling base is 65°F.