Three Island State Park Weather Forecast

    • 47
    • 78

    Mostly Sunny

    • 47
    • 80

    Sunny

    • 55
    • 87

    Mostly Sunny

    • 57
    • 94

    Partly Sunny

    • 52
    • 88

    Slight Chance Rain Showers

    • 46
    • 77

    Chance Rain Showers

Today 7 May Upper Treasure Valley

Sunny. Highs 76 to 81. Southeast Winds 10 to 15 Mph.

Tonight 7 May Upper Treasure Valley

Mostly clear. Lows 46 to 52. East Winds around 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Island State Park Temperature Statistics

May Temperature

Mountain Home Air Force Base (28.6 miles)

  • Lowest 1 May, 2025

    36.7 °F

  • Average May

    55.7 °F

  • Highest 2 May, 2025

    81.6 °F

Climate (2020–Present)

Mountain Home Air Force Base (28.6 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    64.8 °F
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