10-Day Weather Forecast - SeaTac, WA

Mostly cloudy. Highs in the upper 60s to mid 70s. Light wind.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 50s. West wind to 10 mph in the evening becoming light.

Partly sunny in the morning then becoming sunny. Highs in the upper 60s to mid 70s. Light wind.

Mostly clear. Lows in the lower to mid 50s. West wind to 10 mph in the evening becoming light.

Partly sunny. Highs in the lower to mid 70s.

Partly cloudy. Lows in the lower to mid 50s.

Partly sunny. Highs in the lower to mid 70s.

Partly cloudy. Lows in the lower 50s.

Mostly sunny. Highs in the 70s.

Mostly clear. Lows in the lower to mid 50s.

Sunny. Highs in the mid 70s to lower 80s.

Mostly clear. Lows in the mid 50s.

Sunny. Highs in the upper 70s to mid 80s.

Clear. Low temperature around 59F. Dew point will be around 50F with an average humidity of 57%. Winds will be 5 mph from the N.

Sunny. High temperature around 77F. Dew point will be around 52F with an average humidity of 53%. Winds will be 4 mph from the NW.

Clear. Low temperature around 59F. Dew point will be around 52F with an average humidity of 61%. Winds will be 4 mph from the N.

Sunny. High temperature around 78F. Dew point will be around 53F with an average humidity of 55%. Winds will be 4 mph from the NW.

Clear. Low temperature around 58F. Dew point will be around 51F with an average humidity of 61%. Winds will be 4 mph from the NW.