Terreton Weather Forecast

    • 54
    • 89

    Slight Chance Thunderstorms

    • 52
    • 90

    Mostly Sunny

    • 55
    • 90

    Mostly Sunny

    • 57
    • 91

    Mostly Sunny

    • 58
    • 88

    Slight Chance Rain Showers

    • 54
    • 82

    Chance Rain Showers

    • 54
    • 81

    Chance Rain Showers

Today 20 Aug Arco/Mud Lake Desert

Mostly sunny with a slight chance of rain Showers. Highs 86 to 94. South Winds up to 10 Mph. Shifting to southwest in the afternoon.

Tonight 20 Aug Arco/Mud Lake Desert

Mostly clear. Lows 51 to 59. Southwest Winds 10 to 15 Mph. Shifting to north after midnight.

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Terreton Temperature Statistics

August Temperature

Idaho Falls Regional Airport (28.6 miles)

  • Lowest 9 August, 2025

    42.7 °F

  • Average August

    69.9 °F

  • Highest 13 August, 2025

    96.7 °F

Climate (2020–Present)

Idaho Falls Regional Airport (28.6 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    58.9 °F
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