American Falls Dam Weather Forecast

    • 33
    • 54

    Decreasing Clouds

    • 30
    • 51

    Partly Sunny

    • 30
    • 51

    Mostly Sunny

    • 38
    • 50

    Slight Chance Rain

    • 38
    • 52

    Rain Likely

    • 33
    • 45

    Chance Rain/Snow

Today 12 Dec Lower Snake River Plain

Mostly sunny. Highs 48 to 55. Southwest Winds 10 to 15 Mph.

Tonight 12 Dec Lower Snake River Plain

Partly cloudy. Lows 26 to 34. Southwest Winds 10 to 15 Mph.

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American Falls Dam Temperature Statistics

December Temperature

Pocatello, Pocatello Regional Airport (18 miles)

  • Lowest 3 December, 2025

    19 °F

  • Average December

    36.5 °F

  • Highest 9 December, 2025

    53.1 °F

Climate (2020–Present)

Pocatello, Pocatello Regional Airport (18 miles)

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  • Average Low 2020–2025

    35.1 °F

  • Average 2020–2025

    48.4 °F

  • Average High 2020–2025

    61.3 °F
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