Lamona Weather Forecast

    • 54
    • 87

    Mostly Sunny

    • 55
    • 86

    Mostly Sunny

    • 53
    • 86

    Mostly Sunny

    • 55
    • 83

    Partly Sunny

    • 48
    • 78

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

Today 17 Sep Upper Columbia Basin

Sunny. Highs in the mid to upper 80s. East wind 5 to 10 Mph.

Tonight 17 Sep Upper Columbia Basin

Mostly clear. Lows in the 50s. Light wind.

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Lamona Temperature Statistics

September Temperature

Grant County Airport (40.4 miles)

  • Lowest 13 September, 2025

    52 °F

  • Average September

    72.9 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Grant County Airport (40.4 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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