Rock Island Lake Weather Forecast

    • 0
    • 10

    Cold

    • -5
    • 14

    Partly Sunny

    • 3
    • 12

    Mostly Sunny

    • 6
    • 21

    Partly Sunny

    • 6
    • 21

    Mostly Sunny

    • 13
    • 23

    Partly Sunny

Today 18 Jan Boise Mountains

Sunny. Highs 17 to 30.

Tonight 18 Jan Boise Mountains

Partly cloudy. Lows 4 below to 11 above zero.

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Rock Island Lake Temperature Statistics

January Temperature

Stanley, Stanley Ranger Station (19.9 miles)

  • Lowest 14 January, 2025

    -7.1 °F

  • Average January

    19.2 °F

  • Highest 3 January, 2025

    44.7 °F

Climate (2020–Present)

Stanley, Stanley Ranger Station (19.9 miles)

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  • Average Low 2020–2025

    22.7 °F

  • Average 2020–2025

    38 °F

  • Average High 2020–2025

    53.2 °F
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