Missoula Weather Forecast

    • 40
    • 63

    Rain Showers Likely

    • 38
    • 62

    Chance Rain Showers

    • 42
    • 68

    Mostly Cloudy

    • 41
    • 69

    Mostly Sunny

    • 43
    • 74

    Mostly Sunny

    • 44
    • 77

    Mostly Sunny

Today 13 Sep Missoula/Bitterroot Valleys

Areas of rain in the morning. Rain Showers likely and a slight chance of Thunderstorms early in the Afternoon, then slight chance of rain late in the afternoon. Chance of precipitation 70 percent. Highs in the lower to mid 60s. Northwest Winds to 15 Mph in the afternoon.

Tonight 13 Sep Missoula/Bitterroot Valleys

A chance of rain in the Evening, then rain likely after midnight. Chance of rain 70 percent. Lows in the mid 30s to lower 40s. Southwest Winds to 15 Mph.

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Missoula Temperature Statistics

September Temperature

Missoula, Missoula International Airport (5 miles)

  • Lowest 9 September, 2026

    38.6 °F

  • Average September

    59.6 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (5 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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