Idaho Falls Weather Forecast

    • 40
    • 66

    Increasing Clouds

    • 34
    • 61

    Chance Rain

    • 39
    • 67

    Partly Sunny

    • 45
    • 76

    Mostly Sunny

    • 47
    • 80

    Partly Sunny

    • 48
    • 81

    Partly Sunny

    • 41
    • 74

    Partly Sunny

Today 20 May Upper Snake River Plain

Mostly sunny. Highs 59 to 67. South Winds up to 10 Mph. Shifting to southwest in the afternoon.

Tonight 20 May Upper Snake River Plain

Cloudy. A chance of rain Showers and a slight chance of Thunderstorms in the evening. Then a chance of rain after midnight. Lows 34 to 41. West Winds 10 to 15 Mph. Shifting to northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Idaho Falls Temperature Statistics

May Temperature

Idaho Falls Regional Airport (2.5 miles)

  • Lowest 6 May, 2026

    27.6 °F

  • Average May

    54.2 °F

  • Highest 13 May, 2026

    88.6 °F

Climate (2021–Present)

Idaho Falls Regional Airport (2.5 miles)

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  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    59.9 °F
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