Three Island Lake Weather Forecast

    • 18
    • 33

    Snow Showers

    • 20
    • 28

    Mostly Sunny

    • 26
    • 38

    Mostly Sunny

    • 28
    • 42

    Partly Sunny

    • 28
    • 38

    Partly Sunny

    • 26
    • 39

    Snow Showers Likely

Today 19 Oct Boise Mountains

Rain Showers this Morning, then rain and snow Showers this afternoon. Patchy fog this morning. Areas of fog this afternoon. Chance of precipitation near 100 percent. Snow accumulation up to 1 inch. Highs 43 to 56.

Tonight 19 Oct Boise Mountains

Decreasing Clouds. Rain and snow Showers Likely, mainly in the evening. Patchy fog in the evening. Areas of fog after midnight. Chance of precipitation 60 percent. Snow accumulation up to 2 Inches. Colder with Lows 21 to 35.

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  • Temperature Real-Time

Three Island Lake Temperature Statistics

October Temperature

Stanley, Stanley Ranger Station (18.6 miles)

  • Lowest 6 October, 2025

    21.9 °F

  • Average October

    41.4 °F

  • Highest 9 October, 2025

    69.1 °F

Climate (2020–Present)

Stanley, Stanley Ranger Station (18.6 miles)

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  • Average Low 2020–2025

    22.7 °F

  • Average 2020–2025

    38 °F

  • Average High 2020–2025

    53.5 °F
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