Potomac Weather Forecast

    • 41
    • 76

    Mostly Sunny

    • 42
    • 80

    Mostly Sunny

    • 44
    • 79

    Partly Sunny

    • 43
    • 77

    Partly Sunny

    • 46
    • 81

    Partly Sunny

    • 40
    • 74

    Chance Rain

    • 36
    • 61

    Chance Rain

Today 20 Sep Potomac/Seeley Lake Region

Mostly cloudy. Highs in the mid 50s to lower 60s.

Tonight 20 Sep Potomac/Seeley Lake Region

Mostly clear. Patchy fog late in the night. Lows in the 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

September Temperature

Missoula, Missoula International Airport (23.6 miles)

  • Lowest 9 September, 2026

    38.6 °F

  • Average September

    58.5 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (23.6 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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