Lewis And Clark Weather Forecast

    • 46
    • 74

    Rain Showers

    • 38
    • 57

    Rain

    • 40
    • 68

    Partly Sunny

    • 43
    • 77

    Mostly Sunny

    • 45
    • 79

    Partly Sunny

    • 40
    • 72

    Chance Rain

    • 37
    • 66

    Chance Rain

Today 6 Sep Missoula/Bitterroot Valleys

Slight chance of rain early in the morning. Rain Showers likely and a chance of Thunderstorms late in the afternoon. Chance of precipitation 70 percent. Highs in the lower 70s.

Tonight 6 Sep Missoula/Bitterroot Valleys

Rain Showers likely and a chance of Thunderstorms through the night. Patchy fog after midnight. Chance of precipitation near 100 percent. Some Thunderstorms may produce small hail and heavy rainfall. Lows in the mid to upper 40s.

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Lewis And Clark Temperature Statistics

September Temperature

Missoula, Missoula International Airport (6.2 miles)

  • Lowest 1 September, 2026

    45.6 °F

  • Average September

    59 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (6.2 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.8 °F
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