Lewisville Weather Forecast

    • 25
    • 41

    Slight Chance Rain/Snow

    • 27
    • 37

    Mostly Cloudy

    • 34
    • 41

    Chance Rain

    • 39
    • 49

    Chance Rain

    • 38
    • 52

    Chance Rain

    • 31
    • 50

    Slight Chance Rain

Today 6 Dec Upper Snake River Plain

Mostly sunny with a chance of snow Showers. Breezy. Not as cool. Little or no snow accumulation. Highs 35 to 45. Southwest Winds 15 to 25 Mph.

Tonight 6 Dec Upper Snake River Plain

Increasing Clouds. Colder. Lows 18 to 28. Southwest Winds 10 to 15 Mph.

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Lewisville Temperature Statistics

December Temperature

Idaho Falls Regional Airport (12.4 miles)

  • Lowest 3 December, 2025

    9 °F

  • Average December

    26.1 °F

  • Highest 1 December, 2025

    32 °F

Climate (2020–Present)

Idaho Falls Regional Airport (12.4 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    46.2 °F

  • Average High 2020–2025

    59 °F
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