Terreton Weather Forecast

    • 49
    • 81

    Rain Showers Likely

    • 39
    • 69

    Breezy

    • 43
    • 73

    Mostly Sunny

    • 44
    • 76

    Mostly Sunny

    • 49
    • 80

    Mostly Sunny

    • 48
    • 79

    Partly Sunny

    • 44
    • 72

    Partly Sunny

Today 6 Sep Arco/Mud Lake Desert

Sunny, breezy. Highs 76 to 83. Southeast Winds up to 10 Mph. Increasing to south 15 to 25 Mph in the afternoon.

Tonight 6 Sep Arco/Mud Lake Desert

Partly cloudy with isolated Showers and Thunderstorms in the evening. Then mostly cloudy with scattered rain Showers and isolated Thunderstorms after midnight. Windy. Lows 42 to 49. South Winds 20 to 30 Mph.

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Terreton Temperature Statistics

September Temperature

Idaho Falls Regional Airport (28.6 miles)

  • Lowest 4 September, 2026

    46 °F

  • Average September

    64.1 °F

  • Highest 1 September, 2026

    80.7 °F

Climate (2021–2026)

Idaho Falls Regional Airport (28.6 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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