CHELSEA, MASSACHUSETTS

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Elevation: 30 feet Latitude: 42 24N Longitude: 071 06W

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DAILY WEATHER AVERAGE - DECEMBER 18

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	34.9 ^°F	40 ^°F	29.4 ^°F	55.9 ^°F (1996)	10 ^°F (2009)
Dewpoint	22.4 ^°F	28.4 ^°F	16.5 ^°F	50 ^°F (1996)	-9.9 ^°F (2009)
Humidity	62.7 ^%	77 ^%	47.9 ^%		21 ^% (2009)
Barometer	29.98 ⁱⁿ	30.10 ⁱⁿ	29.85 ⁱⁿ	30.48 ⁱⁿ (2002)	29.09 ⁱⁿ (2003)
Wind Speed	11.3 ^mph	17.6 ^mph		32.2 ^mph (2000)
Wind Gust		28.8 ^mph		46 ^mph (2000)
Precipitation	0.32 ⁱⁿ			1.36 ⁱⁿ (2012)

Weather Element	Average
Visibility	9.6 ^mi
Wind Direction	WSW (260 °)

Weather Element	Total
Heating Degree Days	30.3 (Base 18.3)
Growing Degree Days	1 (Base 10)

Total Years on Record: 21

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