Great Falls Lake Weather Forecast

    • 66
    • 91

    Slight Chance Thunderstorms

    • 68
    • 91

    Mostly Sunny

    • 69
    • 93

    Mostly Sunny

    • 66
    • 92

    Rain Showers Likely

    • 64
    • 89

    Chance Thunderstorms

    • 66
    • 90

    Chance Thunderstorms

Today 7 Sep Warren

Mostly sunny. Patchy fog in the morning. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the upper 80s. East Winds around 5 Mph. Chance of rain 20 percent.

Tonight 7 Sep Warren

Partly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 30 percent.

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  • 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

    81.4 °F

  • Highest 3 September, 2026

    98.6 °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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