Lewisville Weather Forecast

    • 36
    • 53

    Slight Chance Rain

    • 34
    • 50

    Mostly Cloudy

    • 29
    • 49

    Mostly Cloudy

    • 23
    • 47

    Partly Sunny

    • 26
    • 47

    Partly Sunny

    • 31
    • 48

    Chance Rain/Snow

Today 10 Dec Upper Snake River Plain

Partly sunny. A chance of rain in the morning. Then a slight chance of rain in the afternoon. Breezy. Highs 43 to 53. Southwest Winds 15 to 25 Mph.

Tonight 10 Dec Upper Snake River Plain

Mostly cloudy. Lows 29 to 39. Southwest Winds 10 to 20 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

    30.9 °F

  • Highest 6 December, 2025

    45 °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

    46.3 °F

  • Average High 2020–2025

    59 °F
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