MERCER ISLAND, WASHINGTON

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

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DAILY WEATHER AVERAGE - 13 OCTOBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	12.7 ^°C	16.7 ^°C	9.9 ^°C	21.1 ^°C (2004)	4 ^°C (2002)
Dewpoint	8.8 ^°C	10.7 ^°C	6.5 ^°C	14 ^°C (2000)	-6.7 ^°C (2009)
Humidity	79 ^%	93.5 ^%	58.4 ^%		29 ^% (2009)
Barometer	1019.6 ^hPa	1022.7 ^hPa	1016.3 ^hPa	1030.1 ^hPa (1995)	988.1 ^hPa (2009)
Wind Speed	9.2 ^km/h	19.5 ^km/h		33.3 ^km/h (1996)
Wind Gust		36.5 ^km/h		44.4 ^km/h (2009)
Precipitation	2.54 ^mm			8.13 ^mm (2008)

Weather Element	Average
Visibility	16.1 ^km
Wind Direction	ESE (122.7 °)

Weather Element	Total
Heating Degree Days	5 (Base 18.3)
Growing Degree Days	3.3 (Base 10)

Total Years on Record: 21

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