ROCKVILLE, MARYLAND

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

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DAILY WEATHER AVERAGE - 17 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	2.2 ^°C	5.4 ^°C	-1.6 ^°C	12 ^°C (2012)	-12 ^°C (2010)
Dewpoint	-2.4 ^°C	0.1 ^°C	-5.3 ^°C	11 ^°C (2012)	-14 ^°C (2009)
Humidity	73.7 ^%	92 ^%	59 ^%		38 ^% (2009)
Barometer	1017.9 ^hPa	1022 ^hPa	1013.2 ^hPa	1030.8 ^hPa (2009)	1001.4 ^hPa (2012)
Wind Speed	9.3 ^km/h	22.9 ^km/h		37 ^km/h (2007)
Wind Gust		43.6 ^km/h		55.5 ^km/h (2007)
Precipitation	10.67 ^mm			23.62 ^mm (2015)

Weather Element	Average
Visibility	12.7 ^km
Wind Direction	S (182.9 °)

Weather Element	Total
Heating Degree Days	16.4 (Base 18.3)

Total Years on Record: 9

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