Rainbow Lake Weather Forecast

    • 40
    • 55

    Rain Showers

    • 37
    • 47

    Rain Showers

    • 30
    • 49

    Partly Sunny

    • 31
    • 49

    Partly Sunny

    • 31
    • 48

    Mostly Cloudy

    • 31
    • 47

    Mostly Cloudy

    • 29
    • 48

    Chance Rain/Snow

Today 31 Oct Upper Snake River Plain

Mostly sunny. Highs 42 to 49.

Tonight 31 Oct Upper Snake River Plain

A chance of rain Showers and a slight chance of Thunderstorms in the evening. Then rain Showers after midnight. Patchy fog after midnight. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Lows 36 to 43. East Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Lake Temperature Statistics

October Temperature

Rexburg, Rexburg-Madison County Airport (2.5 miles)

  • Lowest 29 October, 2026

    27 °F

  • Average October

    50.9 °F

  • Highest 5 October, 2026

    83.6 °F

Climate (2021–2026)

Rexburg, Rexburg-Madison County Airport (2.5 miles)

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  • Average Low 2021–2026

    34.4 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    58.7 °F
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