Olson Airport Weather Forecast

    • 54
    • 80

    Rain

    • 50
    • 69

    Chance Rain

    • 47
    • 68

    Mostly Cloudy

    • 43
    • 57

    Rain Likely

    • 45
    • 63

    Partly Sunny

    • 47
    • 66

    Mostly Cloudy

Today 10 Sep Flathead/Mission Valleys

Mostly cloudy. A 20 percent chance of rain early in the morning. Highs in the 70s to lower 80s. Southwest Winds to 15 Mph in the afternoon.

Tonight 10 Sep Flathead/Mission Valleys

Mostly cloudy with a 50 percent chance of rain. Lows in the 40s to lower 50s. Southwest Winds to 15 Mph.

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Olson Airport Temperature Statistics

September Temperature

Missoula, Missoula International Airport (46 miles)

  • Lowest 1 September, 2026

    45.6 °F

  • Average September

    59.8 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (46 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.7 °F
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