10-Day Weather Forecast - Grand Coulee, WA

Sunny. Highs in the 70s. East wind 5 to 10 mph.

Partly cloudy. Lows in the mid to upper 40s. East wind 5 to 10 mph.

Partly cloudy. Highs in the mid 70s to lower 80s. East wind 5 to 10 mph.

Mostly cloudy. Lows in the lower to mid 50s. Highs in the upper 70s to lower 80s.

Mostly cloudy. Lows in the lower to mid 50s. Highs in the upper 70s to lower 80s.

Mostly cloudy. Lows in the lower to mid 50s. Highs in the upper 70s to lower 80s.

Mostly clear. Highs in the 80s. Lows in the 50s.

Mostly clear. Highs in the 80s. Lows in the 50s.

Mostly clear. Highs in the 80s. Lows in the 50s.

Mostly clear. Highs in the 80s. Lows in the 50s.

Mostly clear. Highs in the 80s. Lows in the 50s.

Mostly clear. Low temperature around 53F. Dew point will be around 39F with an average humidity of 42%. Winds will be 4 mph from the SW.

Sunny. High temperature around 78F. Dew point will be around 42F with an average humidity of 39%. Winds will be 2 mph from the NW.

Clear. Low temperature around 52F. Dew point will be around 41F with an average humidity of 49%. Winds will be 2 mph from the SE.

Mostly sunny. High temperature around 76F. Dew point will be around 40F with an average humidity of 39%. Winds will be 1 mph from the SW.

Partly cloudy. Low temperature around 51F. Dew point will be around 37F with an average humidity of 43%. Winds will be 1 mph from the E.

Partly cloudy. High temperature around 76F. Dew point will be around 38F with an average humidity of 35%. Winds will be 1 mph from the SW.

Partly cloudy. Low temperature around 52F. Dew point will be around 37F with an average humidity of 43%. Winds will be 1 mph from the E.