Rock Island Lake Weather Forecast

    • 33
    • 46

    Sunny

    • 36
    • 52

    Mostly Sunny

    • 36
    • 53

    Rain Showers Likely

    • 35
    • 44

    Rain Showers Likely

    • 32
    • 46

    Chance Rain/Snow

    • 35
    • 46

    Slight Chance Rain/Snow

Today 1 May Boise Mountains

Sunny. Highs 58 to 72.

Tonight 1 May Boise Mountains

Clear. Lows 29 to 44.

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Rock Island Lake Temperature Statistics

May Temperature

Stanley, Stanley Ranger Station (19.9 miles)

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  • Average May

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Climate (2020–Present)

Stanley, Stanley Ranger Station (19.9 miles)

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  • Average Low 2020–2025

    22.6 °F

  • Average 2020–2025

    37.9 °F

  • Average High 2020–2025

    53.3 °F
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