Olson Airport Weather Forecast

    • 49
    • 54

    Rain Showers

    • 49
    • 66

    Rain Likely

    • 55
    • 76

    Mostly Sunny

    • 54
    • 78

    Partly Sunny

    • 49
    • 70

    Chance Rain

    • 46
    • 66

    Chance Rain

Today 7 Sep Flathead/Mission Valleys

Rain Showers likely and a slight chance of Thunderstorms. Chance of precipitation near 100 percent. Cooler. Some Thunderstorms may produce heavy rainfall. Highs in the 50s to lower 60s.

Tonight 7 Sep Flathead/Mission Valleys

Rain likely. Chance of rain 70 percent. Lows in the 40s.

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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 °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

    59.8 °F
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