SEA-TAC, WASHINGTON

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

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DAILY WEATHER AVERAGE - 6 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	4.8 ^°C	7.3 ^°C	2.6 ^°C	12.8 ^°C (2015)	-3.9 ^°C (2013)
Dewpoint	1.4 ^°C	3.4 ^°C	-1 ^°C	9.4 ^°C (2014)	-19.4 ^°C (2009)
Humidity	80.3 ^%	91.1 ^%	64.6 ^%		27 ^% (2009)
Barometer	1017.3 ^hPa	1020.3 ^hPa	1013.5 ^hPa	1033.2 ^hPa (2011)	994.9 ^hPa (2004)
Wind Speed	12.9 ^km/h	22.5 ^km/h		35.2 ^km/h (2003)
Wind Gust		41 ^km/h		48.1 ^km/h (2003)
Precipitation	5.84 ^mm			11.18 ^mm (2015)

Weather Element	Average
Visibility	14.2 ^km
Wind Direction	SE (133.5 °)

Weather Element	Total
Heating Degree Days	13.4 (Base 18.3)
Growing Degree Days	0.3 (Base 10)

Total Years on Record: 21

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