SEA-TAC, WASHINGTON

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Elevation: 137 meters Latitude: 47 27N Longitude: 122 18W

WEATHER

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DAILY WEATHER AVERAGE - 7 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	4.8 ^°C	6.9 ^°C	2.6 ^°C	13.9 ^°C (2014)	-7.2 ^°C (2013)
Dewpoint	0.6 ^°C	2.8 ^°C	-1.8 ^°C	10 ^°C (2015)	-21.7 ^°C (2009)
Humidity	77.9 ^%	88.6 ^%	63 ^%		22 ^% (2009)
Barometer	1017.6 ^hPa	1021 ^hPa	1013.2 ^hPa	1034.2 ^hPa (2001)	985.4 ^hPa (2004)
Wind Speed	11.6 ^km/h	22 ^km/h		35.2 ^km/h (1998)
Wind Gust		40.4 ^km/h		50.1 ^km/h (1997)
Precipitation	10.67 ^mm			35.56 ^mm (2015)

Weather Element	Average
Visibility	12.9 ^km
Wind Direction	ESE (117.1 °)

Weather Element	Total
Heating Degree Days	13.6 (Base 18.3)
Growing Degree Days	0.3 (Base 10)

Total Years on Record: 21

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