MERCER ISLAND, WASHINGTON

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Elevation: 69 meters Latitude: 47 32N Longitude: 122 18W

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DAILY WEATHER AVERAGE - 21 FEBRUARY

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	7.1 ^°C	10.8 ^°C	3.8 ^°C	14.4 ^°C (2010)	-2.2 ^°C (2005)
Dewpoint	3.2 ^°C	5.2 ^°C	1.1 ^°C	11.1 ^°C (2002)	-5 ^°C (2010)
Humidity	78.2 ^%	93.7 ^%	59.4 ^%		28 ^% (2010)
Barometer	1016.3 ^hPa	1019.3 ^hPa	1013.9 ^hPa	1033.2 ^hPa (1997)	990.9 ^hPa (1998)
Wind Speed	10.1 ^km/h	21.6 ^km/h		40.7 ^km/h (1999)
Wind Gust		41.4 ^km/h		57.5 ^km/h (1999)
Precipitation	6.35 ^mm			29.46 ^mm (2002)

Weather Element	Average
Visibility	15.4 ^km
Wind Direction	SE (138.1 °)

Weather Element	Total
Heating Degree Days	11.1 (Base 18.3)
Growing Degree Days	0.6 (Base 10)

Total Years on Record: 22

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