Ritter Island State Park Weather Forecast

    • 60
    • 92

    Isolated Thunderstorms

    • 57
    • 88

    Chance Thunderstorms

    • 59
    • 96

    Sunny

    • 61
    • 100

    Hot

    • 59
    • 95

    Sunny

    • 59
    • 95

    Mostly Sunny

    • 61
    • 97

    Hot

Today 16 Aug Western Magic Valley

Partly cloudy. Isolated Showers and Thunderstorms this afternoon. Patchy smoke this afternoon. Thunderstorms may produce heavy rainfall this afternoon. Chance of rain 20 percent. Highs 88 to 93. Southeast Winds up to 10 Mph this Morning, shifting to west around 10 Mph this afternoon. Gusts to 20 Mph.

Tonight 16 Aug Western Magic Valley

Partly cloudy. Lows 58 to 63. West Winds around 10 Mph with Gusts to 20 Mph.

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Ritter Island State Park Temperature Statistics

August Temperature

Jerome County Airport (19.3 miles)

  • Lowest 9 August, 2025

    49.6 °F

  • Average August

    72.6 °F

  • Highest 13 August, 2025

    95.6 °F

Climate (2020–Present)

Jerome County Airport (19.3 miles)

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  • Average Low 2020–2025

    39.8 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    62 °F
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