Weather statistics for SeaTac, Washington (United States)

Seattle/Tacoma WA weather station: 137 m.a.s.l., 0.0 km away from SeaTac

Average temperature per month

Graph explanation.

Explaination to the graph:
Max temperature: Average max daily (24h) temperature per month
Minimum temperature: Average minimum daily (24h) temperature per month
Average temperature: Average daily (24h) temperature per month.
The temperature normals are measured in the period 1961–1990.
Les mer om normaler her

Source: WMO

Average days with precipitation per month

Graph explanation.

The graph shows average amount of days (24h) with precipitation during a month. When precipitation has surpassed 1mm per day (24h) it is defined as a day with precipitation. The mean period is 1961–1990.

Source: WMO
Tabular view for temperature and precipitation per month
Temperature Precipitation
Months Normal Warmest Coldest Normal
January 4.5°C 7.2°C 1.8°C 15
February 6.4°C 9.7°C 3.0°C 13
March 7.6°C 11.5°C 3.6°C 13
April 9.6°C 14.0°C 5.1°C 10
May 12.8°C 17.7°C 7.9°C 7
June 16.1°C 21.1°C 11.1°C 6
July 18.4°C 24.0°C 12.9°C 3
August 18.6°C 24.0°C 13.2°C 4
September 15.9°C 20.7°C 11.1°C 6
October 11.6°C 15.4°C 7.7°C 10
November 7.4°C 10.3°C 4.5°C 15
December 4.7°C 7.3°C 2.1°C 15