Mission Reservoir Weather Forecast

    • 63
    • 87

    Increasing Clouds

    • 59
    • 84

    Chance Rain Showers

    • 59
    • 80

    Partly Sunny

    • 56
    • 75

    Rain Showers Likely

    • 54
    • 71

    Rain Likely

    • 53
    • 69

    Rain Showers Likely

Today 6 Sep Flathead/Mission Valleys

Mostly sunny. Patchy smoke. Highs in the 80s.

Tonight 6 Sep Flathead/Mission Valleys

Partly cloudy in the evening then becoming mostly cloudy. Areas of smoke. Lows in the 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mission Reservoir Temperature Statistics

September Temperature

Missoula, Missoula International Airport (27.3 miles)

  • Lowest 1 September, 2025

    52 °F

  • Average September

    71.7 °F

  • Highest 2 September, 2025

    96.1 °F

Climate (2020–Present)

Missoula, Missoula International Airport (27.3 miles)

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  • Average Low 2020–2025

    35.5 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    59.2 °F
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