Idaho Falls Regional Airport Weather Forecast

    • 41
    • 69

    Rain Showers

    • 41
    • 71

    Mostly Sunny

    • 41
    • 75

    Sunny

    • 42
    • 78

    Sunny

    • 44
    • 81

    Partly Sunny

    • 47
    • 80

    Partly Sunny

    • 44
    • 77

    Mostly Sunny

Today 15 Sep Upper Snake River Plain

Mostly sunny. A slight chance of Showers and Thunderstorms in the morning. Then a chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Highs 63 to 70. Southwest Winds 10 to 15 Mph.

Tonight 15 Sep Upper Snake River Plain

Partly cloudy. Isolated Showers and Thunderstorms in the evening. Colder. Lows 39 to 46. North Winds around 10 Mph.

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Idaho Falls Regional Airport Temperature Statistics

September Temperature

Idaho Falls Regional Airport (0 miles)

  • Lowest 12 September, 2025

    43 °F

  • Average September

    64.6 °F

  • Highest 3 September, 2025

    90 °F

Climate (2020–Present)

Idaho Falls Regional Airport (0 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    46.1 °F

  • Average High 2020–2025

    58.9 °F
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