Three Island State Park Weather Forecast

    • 45
    • 82

    Becoming Sunny

    • 46
    • 82

    Increasing Clouds

    • 41
    • 81

    Mostly Sunny

    • 51
    • 92

    Mostly Sunny

    • 47
    • 89

    Mostly Sunny

    • 50
    • 95

    Partly Sunny

    • 46
    • 89

    Mostly Sunny

Today 7 May Upper Treasure Valley

Sunny. Highs 78 to 84. Breezy. Northwest Winds 10 to 20 Mph with Gusts to 30 Mph.

Tonight 7 May Upper Treasure Valley

Mostly clear. Lows 43 to 49. Breezy. Northwest Winds 10 to 20 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, 2026

    38.6 °F

  • Average May

    64.4 °F

  • Highest 4 May, 2026

    82.7 °F

Climate (2021–Present)

Mountain Home Air Force Base (28.6 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    65.4 °F
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