ROCKVILLE, MARYLAND

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

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DAILY WEATHER AVERAGE - 17 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	16.2 ^°C	21.4 ^°C	11.4 ^°C	29 ^°C (2015)	8 ^°C (2013)
Dewpoint	11.3 ^°C	14 ^°C	9 ^°C	18 ^°C (2010)	2 ^°C (2013)
Humidity	75.7 ^%	96.4 ^%	51.1 ^%		32 ^% (2010)
Barometer	1023 ^hPa	1025.7 ^hPa	1020.3 ^hPa	1031.5 ^hPa (2013)	1010.8 ^hPa (2010)
Wind Speed	3.9 ^km/h	14.3 ^km/h		29.6 ^km/h (2010)
Wind Gust		40.7 ^km/h		40.7 ^km/h (2010)
Precipitation	5.08 ^mm			7.87 ^mm (2009)

Weather Element	Average
Visibility	15.1 ^km
Wind Direction	ENE (68.4 °)

Total Years on Record: 7

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