Lower Arcadia Reservoir Weather Forecast

    • 43
    • 69

    Increasing Clouds

    • 42
    • 69

    Partly Sunny

    • 46
    • 75

    Mostly Sunny

    • 46
    • 73

    Mostly Sunny

    • 43
    • 68

    Partly Sunny

    • 42
    • 68

    Mostly Cloudy

Today 22 Sep Upper Snake River Plain

Mostly cloudy. Highs 66 to 73. Northeast Winds up to 10 Mph. Shifting to southwest around 10 Mph in the afternoon.

Tonight 22 Sep Upper Snake River Plain

Mostly cloudy. A chance of rain Showers and a slight chance of Thunderstorms in the evening. Lows 39 to 47. South Winds up to 10 Mph in the evening. Becoming light and variable. Chance of precipitation 50 percent.

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Lower Arcadia Reservoir Temperature Statistics

September Temperature

Rexburg, Rexburg-Madison County Airport (23.6 miles)

  • Lowest 15 September, 2026

    35.7 °F

  • Average September

    61.8 °F

  • Highest 6 September, 2026

    84.7 °F

Climate (2021–2026)

Rexburg, Rexburg-Madison County Airport (23.6 miles)

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  • Average Low 2021–2026

    34.4 °F

  • Average 2021–2026

    46.5 °F

  • Average High 2021–2026

    58.6 °F
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