Three Island Lake Weather Forecast

    • 24
    • 35

    Mostly Sunny

    • 28
    • 32

    Rain/Snow Likely

    • 19
    • 30

    Blizzard

    • 11
    • 25

    Snow

    • 23
    • 24

    Snow

    • 13
    • 26

    Snow

Today 14 Dec Boise Mountains

Sunny. Highs 43 to 55.

Tonight 14 Dec Boise Mountains

Mostly clear. Lows 23 to 37.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Island Lake Temperature Statistics

December Temperature

Stanley, Stanley Ranger Station (18.6 miles)

  • Lowest 1 December, 2025

    8.1 °F

  • Average December

    29.7 °F

  • Highest 12 December, 2025

    48.9 °F

Climate (2020–Present)

Stanley, Stanley Ranger Station (18.6 miles)

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  • Average Low 2020–2025

    23 °F

  • Average 2020–2025

    38.3 °F

  • Average High 2020–2025

    53.8 °F
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