Castle Lake Weather Forecast

    • 29
    • 51

    Rain/Snow Likely

    • 27
    • 37

    Chance Snow Showers

    • 33
    • 50

    Mostly Sunny

    • 39
    • 54

    Partly Sunny

    • 40
    • 54

    Partly Sunny

    • 38
    • 51

    Chance Rain

Today 6 Sep Sawtooth/Stanley Basin

Mostly cloudy with a chance of rain Showers in the morning. Then mostly sunny with a chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Highs 62 to 72.

Tonight 6 Sep Sawtooth/Stanley Basin

A chance of rain Showers and a slight chance of Thunderstorms in the evening. Then rain Showers, a slight chance of Thunderstorms and snow Showers after midnight. Little or no snow accumulation. Lows 31 to 41.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Lake Temperature Statistics

September Temperature

Stanley, Stanley Ranger Station (20.5 miles)

  • Lowest 1 September, 2026

    33.7 °F

  • Average September

    52.4 °F

  • Highest 1 September, 2026

    77.6 °F

Climate (2021–2026)

Stanley, Stanley Ranger Station (20.5 miles)

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  • Average Low 2021–2026

    23.2 °F

  • Average 2021–2026

    38.4 °F

  • Average High 2021–2026

    54 °F
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