MERCER ISLAND, WASHINGTON

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

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DAILY WEATHER AVERAGE - 18 APRIL

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	10.1 ^°C	14.4 ^°C	6.6 ^°C	21.1 ^°C (2010)	2.8 ^°C (2008)
Dewpoint	4.4 ^°C	6.2 ^°C	1.7 ^°C	10.6 ^°C (2010)	-4.4 ^°C (2015)
Humidity	70 ^%	88.7 ^%	46.1 ^%		28 ^% (2006)
Barometer	1020.3 ^hPa	1023.4 ^hPa	1016.9 ^hPa	1031.8 ^hPa (2013)	1008.8 ^hPa (1997)
Wind Speed	9.5 ^km/h	18.5 ^km/h		29.6 ^km/h (1995)
Wind Gust		31.1 ^km/h		38.9 ^km/h (2008)
Precipitation	2.29 ^mm			4.83 ^mm (2013)

Weather Element	Average
Visibility	17.2 ^km
Wind Direction	SSE (143.1 °)

Weather Element	Total
Heating Degree Days	7.8 (Base 18.3)
Growing Degree Days	1.8 (Base 10)

Total Years on Record: 21

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