GROTON, MASSACHUSETTS

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Elevation: 104 meters Latitude: 42 36N Longitude: 071 35W

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DAILY WEATHER AVERAGE - 19 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-1.2 ^°C	3.1 ^°C	-6.7 ^°C	7.8 ^°C (1997)	-11.7 ^°C (2007)
Dewpoint	-7.2 ^°C	-4.2 ^°C	-11.1 ^°C	1.7 ^°C (2002)	-21.7 ^°C (1999)
Humidity	66.5 ^%	86.2 ^%	46.7 ^%		23 ^% (1999)
Barometer	1015.9 ^hPa	1021 ^hPa	1011.5 ^hPa	1033.9 ^hPa (1999)	998.3 ^hPa (2012)
Wind Speed	8.2 ^km/h	20.6 ^km/h		31.5 ^km/h (2006)
Wind Gust		37.7 ^km/h		46.3 ^km/h (2011)
Precipitation	7.37 ^mm			17.53 ^mm (2008)

Weather Element	Average
Visibility	14.5 ^km
Wind Direction	SSE (160.9 °)

Weather Element	Total
Heating Degree Days	20.2 (Base 18.3)

Total Years on Record: 18

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