SEA-TAC, WASHINGTON

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

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DAILY WEATHER AVERAGE - 20 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	14.7 ^°C	19.6 ^°C	11.1 ^°C	26.1 ^°C (1999)	8.9 ^°C (2007)
Dewpoint	10.2 ^°C	11.9 ^°C	7.5 ^°C	16 ^°C (2000)	-1.1 ^°C (1995)
Humidity	76.4 ^%	93 ^%	52.2 ^%		22 ^% (1995)
Barometer	1018.6 ^hPa	1021 ^hPa	1015.9 ^hPa	1030.8 ^hPa (2009)	1003.7 ^hPa (2013)
Wind Speed	11.7 ^km/h	20.4 ^km/h		37 ^km/h (2015)
Wind Gust		38.1 ^km/h		48.1 ^km/h (2015)
Precipitation	7.62 ^mm			19.81 ^mm (2008)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	SSE (148.8 °)

Total Years on Record: 21

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