Olson Airport Weather Forecast

    • 46
    • 67

    Mostly Sunny

    • 52
    • 67

    Chance Rain Showers

    • 46
    • 66

    Chance Rain Showers

    • 49
    • 70

    Partly Sunny

    • 50
    • 72

    Partly Sunny

    • 47
    • 68

    Partly Sunny

Today 28 Sep Flathead/Mission Valleys

Partly cloudy early in the morning then becoming sunny. Highs in the 60s.

Tonight 28 Sep Flathead/Mission Valleys

Mostly clear. Lows in the mid 30s to lower 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olson Airport Temperature Statistics

September Temperature

Missoula, Missoula International Airport (46 miles)

  • Lowest 9 September, 2026

    38.6 °F

  • Average September

    58.6 °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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