SEA-TAC, WASHINGTON

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

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DAILY WEATHER AVERAGE - 16 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	5.9 ^°C	8.2 ^°C	3.3 ^°C	12 ^°C (1997)	-6.7 ^°C (2008)
Dewpoint	2.7 ^°C	4.9 ^°C	-0.2 ^°C	10 ^°C (1999)	-12.8 ^°C (2014)
Humidity	81.5 ^%	92.7 ^%	66.8 ^%		41 ^% (2006)
Barometer	1017.6 ^hPa	1022 ^hPa	1013.2 ^hPa	1038.3 ^hPa (1996)	980.4 ^hPa (2002)
Wind Speed	14.2 ^km/h	25.7 ^km/h		42.6 ^km/h (2001)
Wind Gust		47.5 ^km/h		70.3 ^km/h (2000)
Precipitation	17.78 ^mm			46.48 ^mm (1997)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	SE (137.5 °)

Weather Element	Total
Heating Degree Days	12.6 (Base 18.3)

Total Years on Record: 21

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