SEA-TAC, WASHINGTON

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

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DAILY WEATHER AVERAGE - 4 OCTOBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	12.7 ^°C	17.2 ^°C	9.3 ^°C	22.8 ^°C (2015)	5.6 ^°C (2000)
Dewpoint	8.2 ^°C	9.7 ^°C	6.1 ^°C	16.7 ^°C (1996)	-0.6 ^°C (2001)
Humidity	77 ^%	92 ^%	56.1 ^%		28 ^% (2001)
Barometer	1017.3 ^hPa	1020.3 ^hPa	1014.2 ^hPa	1033.2 ^hPa (2013)	991.2 ^hPa (2008)
Wind Speed	12.2 ^km/h	21.1 ^km/h		40.7 ^km/h (2008)
Wind Gust		39.9 ^km/h		55.5 ^km/h (2008)
Precipitation	5.08 ^mm			18.8 ^mm (1997)

Weather Element	Average
Visibility	14.5 ^km
Wind Direction	SE (137.1 °)

Weather Element	Total
Heating Degree Days	5.1 (Base 18.3)
Growing Degree Days	3.2 (Base 10)

Total Years on Record: 21

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