SEA-TAC, WASHINGTON

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Elevation: 137 meters Latitude: 47 27N 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	9.2 ^°C	13.3 ^°C	5.8 ^°C	20.6 ^°C (2010)	2.8 ^°C (2011)
Dewpoint	4.3 ^°C	6.1 ^°C	1.7 ^°C	10 ^°C (2010)	-3.3 ^°C (2010)
Humidity	73.6 ^%	90.9 ^%	49.1 ^%		33 ^% (2010)
Barometer	1020.7 ^hPa	1023.4 ^hPa	1017.3 ^hPa	1032.5 ^hPa (2013)	1008.1 ^hPa (1997)
Wind Speed	11.6 ^km/h	21.6 ^km/h		37 ^km/h (2008)
Wind Gust		36.9 ^km/h		55.5 ^km/h (2008)
Precipitation	2.29 ^mm			6.1 ^mm (2001)

Weather Element	Average
Visibility	16.4 ^km
Wind Direction	SSE (161.6 °)

Weather Element	Total
Heating Degree Days	8.8 (Base 18.3)
Growing Degree Days	2.1 (Base 10)

Total Years on Record: 21

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