Lewisville Weather Forecast

    • 34
    • 51

    Decreasing Clouds

    • 40
    • 54

    Rain

    • 34
    • 53

    Rain

    • 25
    • 45

    Rain/Snow

    • 19
    • 38

    Partly Sunny

    • 17
    • 37

    Partly Sunny

    • 18
    • 39

    Mostly Cloudy

Today 23 Dec Upper Snake River Plain

Mostly cloudy. Patchy fog in the morning. Highs 43 to 53. East Winds up to 10 Mph.

Tonight 23 Dec Upper Snake River Plain

Decreasing Clouds. Patchy fog. Lows 29 to 39. Northeast Winds around 10 Mph. Shifting to southeast after midnight.

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Lewisville Temperature Statistics

December Temperature

Idaho Falls Regional Airport (12.4 miles)

  • Lowest 3 December, 2025

    9 °F

  • Average December

    36.1 °F

  • Highest 11 December, 2025

    54 °F

Climate (2020–Present)

Idaho Falls Regional Airport (12.4 miles)

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  • Average Low 2020–2025

    33.4 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    59.2 °F
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