Olson Airport Weather Forecast

    • 55
    • 79

    Decreasing Clouds

    • 52
    • 75

    Mostly Sunny

    • 56
    • 84

    Partly Sunny

    • 49
    • 78

    Rain Likely

    • 45
    • 58

    Mostly Cloudy

    • 47
    • 61

    Mostly Cloudy

Today 22 Sep Flathead/Mission Valleys

Partly cloudy. Highs in the 70s.

Tonight 22 Sep Flathead/Mission Valleys

Mostly cloudy in the evening then clearing. Lows in the mid 40s to lower 50s.

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Olson Airport Temperature Statistics

September Temperature

Missoula, Missoula International Airport (46 miles)

  • Lowest 9 September, 2026

    38.6 °F

  • Average September

    58.5 °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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