ROCKVILLE, MARYLAND

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Elevation: 127 meters Latitude: 39 06N Longitude: 077 06W

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DAILY WEATHER AVERAGE - 11 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	2.6 ^°C	6.9 ^°C	-1.4 ^°C	17 ^°C (2015)	-7 ^°C (2011)
Dewpoint	-3.4 ^°C	0.2 ^°C	-6.6 ^°C	9 ^°C (2008)	-17 ^°C (2009)
Humidity	68 ^%	86.6 ^%	48.9 ^%		28 ^% (2009)
Barometer	1021.3 ^hPa	1025.7 ^hPa	1015.6 ^hPa	1039.3 ^hPa (2011)	999.7 ^hPa (2008)
Wind Speed	8.7 ^km/h	20.4 ^km/h		37 ^km/h (2014)
Wind Gust		40.1 ^km/h		53.8 ^km/h (2009)
Precipitation	24.38 ^mm			71.12 ^mm (2008)

Weather Element	Average
Visibility	14 ^km
Wind Direction	SSE (148.6 °)

Weather Element	Total
Heating Degree Days	15.6 (Base 18.3)

Total Years on Record: 9

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