ROCKVILLE, MARYLAND

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

WEATHER

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DAILY WEATHER AVERAGE - 15 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	5.7 ^°C	10.6 ^°C	1 ^°C	19 ^°C (2015)	-9 ^°C (2010)
Dewpoint	-0.3 ^°C	4.1 ^°C	-4.7 ^°C	16 ^°C (2015)	-17 ^°C (2010)
Humidity	67.4 ^%	88.1 ^%	50.7 ^%		34 ^% (2010)
Barometer	1017.9 ^hPa	1022.7 ^hPa	1013.2 ^hPa	1031.5 ^hPa (2007)	999 ^hPa (2015)
Wind Speed	11.4 ^km/h	24.9 ^km/h		37 ^km/h (2013)
Wind Gust		41.2 ^km/h		50.1 ^km/h (2010)
Precipitation	3.81 ^mm			11.68 ^mm (2007)

Weather Element	Average
Visibility	15.1 ^km
Wind Direction	SSW (192.3 °)

Weather Element	Total
Heating Degree Days	12.6 (Base 18.3)
Growing Degree Days	2.2 (Base 10)

Total Years on Record: 9

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