10-Day Weather Forecast - Grand Coulee, WA

Mostly cloudy in the morning then clearing. A 20 percent chance of rain showers. Highs in the mid 60s to lower 70s. South wind 5 to 10 mph.

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

Mostly cloudy with a 40 percent chance of rain showers. Highs in the upper 60s to lower 70s. East wind 5 to 10 mph.

Partly cloudy. Lows in the mid 40s to lower 50s. East wind 5 to 10 mph.

Partly cloudy with a 20 percent chance of rain showers. 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 40 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 70s.

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

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

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

Mostly clear. Highs in the upper 70s to lower 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.