Idaho Falls Regional Airport Weather Forecast

    • 37
    • 69

    Becoming Sunny

    • 40
    • 75

    Mostly Sunny

    • 45
    • 77

    Slight Chance Rain

    • 44
    • 77

    Mostly Sunny

    • 45
    • 80

    Mostly Sunny

    • 48
    • 82

    Partly Sunny

Today 20 Sep Upper Snake River Plain

Sunny. Highs 63 to 70. Light and variable Winds.

Tonight 20 Sep Upper Snake River Plain

Mostly clear. Lows 36 to 44. Light and variable Winds. Becoming northeast up to 10 Mph after midnight.

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Idaho Falls Regional Airport Temperature Statistics

September Temperature

Idaho Falls Regional Airport (0 miles)

  • Lowest 15 September, 2026

    32.6 °F

  • Average September

    62 °F

  • Highest 6 September, 2026

    86.6 °F

Climate (2021–2026)

Idaho Falls Regional Airport (0 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    60 °F
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