Upper Rattlesnake Weather Forecast

    • 39
    • 70

    Mostly Sunny

    • 47
    • 70

    Partly Sunny

    • 40
    • 68

    Partly Sunny

    • 43
    • 72

    Partly Sunny

    • 44
    • 74

    Partly Sunny

    • 42
    • 71

    Partly Sunny

Today 28 Sep Missoula/Bitterroot Valleys

Mostly sunny. Highs near 70.

Tonight 28 Sep Missoula/Bitterroot Valleys

Mostly clear. Lows in the mid to upper 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Rattlesnake Temperature Statistics

September Temperature

Missoula, Missoula International Airport (5.6 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 (5.6 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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