Lewisville Weather Forecast

    • 53
    • 83

    Slight Chance Thunderstorms

    • 52
    • 85

    Mostly Sunny

    • 53
    • 87

    Mostly Sunny

    • 51
    • 89

    Mostly Sunny

    • 51
    • 90

    Mostly Sunny

    • 51
    • 89

    Mostly Sunny

Today 22 Jul Upper Snake River Plain

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Breezy. Highs 78 to 85. Southwest Winds 10 to 15 Mph. Increasing to 15 to 25 Mph in the afternoon.

Tonight 22 Jul Upper Snake River Plain

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows 49 to 57. West Winds 10 to 20 Mph. Chance of precipitation 20 percent.

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Lewisville Temperature Statistics

July Temperature

Idaho Falls Regional Airport (12.4 miles)

  • Lowest 17 July, 2025

    44.7 °F

  • Average July

    70.3 °F

  • Highest 1 July, 2025

    97.6 °F

Climate (2020–Present)

Idaho Falls Regional Airport (12.4 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    58.9 °F
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