Ritzville Weather Forecast

    • 63
    • 93

    Mostly Sunny

    • 62
    • 91

    Partly Sunny

    • 58
    • 87

    Chance Rain Showers

    • 55
    • 80

    Chance Rain Showers

    • 55
    • 76

    Chance Rain Showers

    • 54
    • 76

    Chance Rain Showers

Today 5 Sep Upper Columbia Basin

Sunny. Haze and Areas of smoke. Highs in the lower 90s. Northeast wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Sep Upper Columbia Basin

Mostly clear. Areas of smoke. Lows in the 60s. Northeast wind 5 to 10 Mph.

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Ritzville Temperature Statistics

September Temperature

Grant County Airport (44.1 miles)

  • Lowest 2 September, 2025

    61 °F

  • Average September

    79.2 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Grant County Airport (44.1 miles)

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  • Average Low 2020–2025

    40.9 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    64.2 °F
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