Olson Airport Weather Forecast

    • 46
    • 79

    Chance Rain

    • 40
    • 58

    Partly Sunny

    • 44
    • 63

    Partly Sunny

    • 46
    • 64

    Partly Sunny

    • 49
    • 63

    Chance Rain

    • 47
    • 64

    Slight Chance Rain

Today 25 Sep Flathead/Mission Valleys

Mostly cloudy. A 50 percent chance of Areas of rain in the afternoon. Highs in the upper 60s to mid 70s. Southwest Winds 15 to 25 Mph. Gusts up to 30 Mph increasing to 40 Mph in the afternoon.

Tonight 25 Sep Flathead/Mission Valleys

Mostly cloudy in the evening then becoming partly cloudy. A 50 percent chance of rain. Lows in the upper 30s to mid 40s. Southwest Winds 15 to 25 Mph.

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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

    58.9 °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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