Great Falls Lake Weather Forecast

    • 74
    • 98

    Hot

    • 73
    • 98

    Slight Chance Thunderstorms

    • 70
    • 97

    Slight Chance Thunderstorms

    • 68
    • 94

    Mostly Sunny

    • 68
    • 91

    Chance Thunderstorms

    • 68
    • 91

    Slight Chance Thunderstorms

    • 70
    • 93

    Mostly Sunny

Today 3 Sep Warren

Sunny with a slight chance of Showers and Thunderstorms. Hot. Near steady temperature in the mid 90s. Light and variable Winds. Chance of rain 20 percent. Heat index Values up to 105.

Tonight 3 Sep Warren

Partly cloudy this Evening, then clearing. Lows in the mid 70s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Lake Temperature Statistics

September Temperature

McMinnville Warren County Memorial Airport (13.7 miles)

  • Lowest 1 September, 2026

    66.2 °F

  • Average September

    80.3 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

McMinnville Warren County Memorial Airport (13.7 miles)

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    59.5 °F

  • Average High 2021–2026

    70.7 °F
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