Grand Coulee
Washington, USA
Long-term weather forecast
Long-term weather forecast
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June weather forecast and Climate
Grand Coulee, WA

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  • The average high temperature in June: 78°F

Warmest months (with the highest average high temperature) are July and August (87°F).
The month with the lowest average high temperature is December (32°F).

  • The average low temperature in June: 51°F

The month with the highest average low temperature is July (58°F).
The coldest month (with the lowest average low temperature) is December (22°F).

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  • The average rainfall in June: 1.1"

The wettest month (with the highest rainfall) is December (1.5").
The driest month (with the lowest rainfall) is August (0.3").

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