Coffeepot Lake Weather Forecast

    • 42
    • 65

    Chance Rain Showers

    • 46
    • 69

    Partly Sunny

    • 49
    • 77

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 50
    • 82

    Partly Sunny

    • 53
    • 82

    Partly Sunny

Today 22 May Upper Columbia Basin

Mostly cloudy with a 50 percent chance of rain Showers. Highs in the lower 60s to lower 70s. Northeast wind 5 to 10 Mph shifting to the southwest in the afternoon. Rainfall Amounts less than a tenth of an inch.

Tonight 22 May Upper Columbia Basin

Mostly clear. Lows in the lower to mid 40s. South wind 5 to 10 Mph.

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Coffeepot Lake Temperature Statistics

May Temperature

Grant County Airport (39.8 miles)

  • Lowest 5 May, 2025

    34.6 °F

  • Average May

    58.2 °F

  • Highest 2 May, 2025

    82.7 °F

Climate (2020–Present)

Grant County Airport (39.8 miles)

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  • Average Low 2020–2025

    40.9 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    64.1 °F
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