Peterson Lake Weather Forecast

    • 41
    • 46

    Rain Likely

    • 45
    • 58

    Mostly Sunny

    • 46
    • 63

    Sunny

    • 47
    • 63

    Mostly Sunny

    • 47
    • 61

    Partly Sunny

    • 46
    • 61

    Slight Chance Rain

Today 15 Sep Bitterroot/Sapphire Mountains

Rain likely in the Morning, then chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the 50s to lower 60s.

Tonight 15 Sep Bitterroot/Sapphire Mountains

Partly cloudy. Lows in the mid 30s to lower 40s.

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  • Temperature Real-Time

Peterson Lake Temperature Statistics

September Temperature

Missoula, Missoula International Airport (20.5 miles)

  • Lowest 9 September, 2025

    48 °F

  • Average September

    67.9 °F

  • Highest 2 September, 2025

    96.1 °F

Climate (2020–Present)

Missoula, Missoula International Airport (20.5 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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