POTOMAC, MARYLAND

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Elevation: 8 meters Latitude: 39 02N Longitude: 077 15W

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DAILY WEATHER AVERAGE - 30 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	2.9 ^°C	6.6 ^°C	-1.4 ^°C	12 ^°C (2011)	-9 ^°C (2009)
Dewpoint	-3.5 ^°C	-1 ^°C	-6.7 ^°C	8 ^°C (2015)	-13 ^°C (2008)
Humidity	66 ^%	82.9 ^%	48.4 ^%		20 ^% (2008)
Barometer	1021 ^hPa	1024.7 ^hPa	1015.9 ^hPa	1033.5 ^hPa (2009)	1007.8 ^hPa (2008)
Wind Speed	7.4 ^km/h	20.1 ^km/h		35.2 ^km/h (2008)
Wind Gust		43.6 ^km/h		50.1 ^km/h (2008)
Precipitation	6.35 ^mm			10.41 ^mm (2007)

Weather Element	Average
Visibility	14 ^km
Wind Direction	SE (140.1 °)

Weather Element	Total
Heating Degree Days	15.8 (Base 18.3)

Total Years on Record: 7

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