Terreton Weather Forecast

    • 14
    • 27

    Mostly Cloudy

    • 13
    • 31

    Mostly Cloudy

    • 7
    • 31

    Mostly Sunny

    • 7
    • 28

    Mostly Sunny

    • 9
    • 28

    Partly Sunny

    • 13
    • 31

    Partly Sunny

Today 21 Jan Arco/Mud Lake Desert

Partly sunny. Patchy fog in the morning. Highs 22 to 29. Light and variable Winds.

Tonight 21 Jan Arco/Mud Lake Desert

Decreasing Clouds. Lows 11 to 19. Light and variable Winds.

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Terreton Temperature Statistics

January Temperature

Idaho Falls Regional Airport (28.6 miles)

  • Lowest 17 January, 2026

    16 °F

  • Average January

    30 °F

  • Highest 3 January, 2026

    48 °F

Climate (2021–Present)

Idaho Falls Regional Airport (28.6 miles)

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  • Average Low 2021–2026

    33.6 °F

  • Average 2021–2026

    46.5 °F

  • Average High 2021–2026

    59.3 °F
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