10-Day Weather Forecast - Grand Coulee, WA

Mostly cloudy with a chance of rain showers in the morning, then partly cloudy in the afternoon. Highs in the upper 60s to lower 70s. South wind 5 to 10 mph. Chance of precipitation 20 percent.

Mostly clear. Lows in the mid to upper 40s. Light wind, becoming northeast 5 to 10 mph overnight.

Partly cloudy with a 20 percent chance of rain showers. Highs in the upper 60s to lower 70s. Northeast wind 5 to 10 mph.

Partly cloudy with a 20 percent chance of rain showers. Lows in the mid 40s to lower 50s. North wind 5 to 10 mph.

Mostly cloudy. Highs in the 70s.

Mostly cloudy with a 50 percent chance of rain showers. Lows in the mid 40s to lower 50s.

Mostly cloudy with a 50 percent chance of rain showers. Highs in the lower to mid 70s.

Partly cloudy with a 20 percent chance of rain showers. Lows in the mid 40s to lower 50s.

Partly cloudy. Highs in the mid to upper 70s.

Partly cloudy. Lows in the mid 40s to lower 50s.

Mostly clear. Highs in the upper 70s to mid 80s.

Mostly clear. Lows in the mid 40s to mid 50s.

Mostly clear. Highs in the upper 70s to mid 80s.

Mostly clear. Low temperature around 57F. Dew point will be around 50F with an average humidity of 62%. Winds will be 2 mph from the SW.

Partly cloudy. High temperature around 74F. Dew point will be around 51F with an average humidity of 56%. Winds will be 2 mph from the SW.

Partly cloudy. Low temperature around 55F. Dew point will be around 50F with an average humidity of 67%. Winds will be 2 mph from the SW.

Partly cloudy. High temperature around 73F. Dew point will be around 49F with an average humidity of 54%. Winds will be 3 mph from the SW.

Partly cloudy. Low temperature around 55F. Dew point will be around 49F with an average humidity of 64%. Winds will be 2 mph from the SW.