Gibson Reservoir Weather Forecast

    • 50
    • 75

    Slight Chance Thunderstorms

    • 47
    • 75

    Partly Sunny

    • 48
    • 77

    Mostly Sunny

    • 52
    • 81

    Partly Sunny

    • 54
    • 82

    Partly Sunny

    • 50
    • 81

    Chance Rain Showers

Today 17 Aug Southern Rocky Mountain Front

Partly sunny. Slight chance of rain Showers early in the afternoon. Slight chance of Thunderstorms late in the afternoon. Highs 64 to 74. West Winds up to 15 Mph. Chance of precipitation 20 percent.

Tonight 17 Aug Southern Rocky Mountain Front

Partly cloudy. A 20 percent chance of Thunderstorms in the evening. Lows 48 to 54. West Winds up to 10 Mph.

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  • Temperature Real-Time

Gibson Reservoir Temperature Statistics

August Temperature

Great Falls, Great Falls International Airport (66.5 miles)

  • Lowest 4 August, 2026

    38.6 °F

  • Average August

    65.3 °F

  • Highest 1 August, 2026

    102.7 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (66.5 miles)

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  • Average Low 2021–2026

    34.3 °F

  • Average 2021–2026

    46.8 °F

  • Average High 2021–2026

    59 °F
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