Lewisville Weather Forecast

    • 15
    • 36

    Mostly Sunny

    • 16
    • 35

    Mostly Sunny

    • 15
    • 35

    Partly Sunny

    • 20
    • 36

    Partly Sunny

    • 23
    • 37

    Mostly Cloudy

    • 20
    • 38

    Mostly Cloudy

Today 18 Jan Upper Snake River Plain

Sunny. Patchy freezing fog in the morning. Highs around 35. Northeast Winds up to 10 Mph.

Tonight 18 Jan Upper Snake River Plain

Mostly clear. Patchy freezing fog. Lows 12 to 19. Northeast Winds up to 10 Mph.

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Lewisville Temperature Statistics

January Temperature

Idaho Falls Regional Airport (12.4 miles)

  • Lowest 11 January, 2026

    17.1 °F

  • Average January

    30.7 °F

  • Highest 3 January, 2026

    48 °F

Climate (2021–Present)

Idaho Falls Regional Airport (12.4 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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