American Falls Reservoir Weather Forecast

    • 49
    • 87

    Chance Thunderstorms

    • 49
    • 91

    Mostly Sunny

    • 56
    • 96

    Mostly Sunny

    • 56
    • 93

    Mostly Sunny

    • 53
    • 91

    Mostly Sunny

    • 54
    • 93

    Mostly Sunny

    • 56
    • 91

    Partly Sunny

Today 17 Aug Lower Snake River Plain

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds in the afternoon. Highs 79 to 88. Southwest Winds 10 to 15 Mph.

Tonight 17 Aug Lower Snake River Plain

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Some Thunderstorms may produce gusty Winds in the evening. Lows 49 to 59. Southwest Winds around 10 Mph. Shifting to northeast after midnight.

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American Falls Reservoir Temperature Statistics

August Temperature

Pocatello, Pocatello Regional Airport (4.3 miles)

  • Lowest 10 August, 2025

    41.6 °F

  • Average August

    72.5 °F

  • Highest 13 August, 2025

    98.7 °F

Climate (2020–Present)

Pocatello, Pocatello Regional Airport (4.3 miles)

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  • Average Low 2020–2025

    34.7 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    61.2 °F
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