Missoula Weather Forecast

    • 47
    • 66

    Mostly Cloudy

    • 47
    • 78

    Becoming Sunny

    • 48
    • 82

    Sunny

    • 48
    • 84

    Mostly Sunny

    • 51
    • 84

    Partly Sunny

    • 49
    • 81

    Partly Sunny

    • 45
    • 72

    Partly Sunny

Today 15 Sep Missoula/Bitterroot Valleys

Rain Showers likely early in the Morning, then chance of rain Showers in the late morning and afternoon. Slight chance of Thunderstorms early in the afternoon. Chance of precipitation 60 percent. Highs in the lower to mid 60s.

Tonight 15 Sep Missoula/Bitterroot Valleys

Partly cloudy until early morning then becoming mostly cloudy. Patchy fog after midnight. Lows in the lower to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Missoula Temperature Statistics

September Temperature

Missoula, Missoula International Airport (5 miles)

  • Lowest 13 September, 2025

    46.9 °F

  • Average September

    67.3 °F

  • Highest 2 September, 2025

    96.1 °F

Climate (2020–Present)

Missoula, Missoula International Airport (5 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    59.3 °F
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