Willow Lake Weather Forecast

    • 56
    • 85

    Becoming Sunny

    • 55
    • 85

    Mostly Sunny

    • 55
    • 84

    Partly Sunny

    • 46
    • 75

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

    • 54
    • 82

    Partly Sunny

Today 18 Sep Upper Columbia Basin

Sunny, haze. Highs in the lower to mid 80s. South wind 5 to 10 Mph.

Tonight 18 Sep Upper Columbia Basin

Mostly clear. Areas of smoke overnight. Lows in the 50s. Light Wind, becoming northwest 5 to 10 Mph overnight.

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Willow Lake Temperature Statistics

September Temperature

Grant County Airport (42.9 miles)

  • Lowest 13 September, 2025

    52 °F

  • Average September

    72.9 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Grant County Airport (42.9 miles)

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  • Average Low 2020–2025

    41 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    64.3 °F
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