Crystal Lake Weather Forecast

    • 60
    • 75

    Rain Showers Likely

    • 63
    • 66

    Rain Showers Likely

    • 69
    • 72

    Slight Chance Rain Showers

    • 71
    • 75

    Chance Rain Showers

    • 72
    • 78

    Slight Chance Rain Showers

    • 70
    • 78

    Mostly Sunny

    • 65
    • 76

    Mostly Sunny

Today 5 Sep Eastern San Gabriel Mountains

Sunny. Highs from the upper 70s and 80s at low Elevations to the mid 60s to lower 70s at high Elevations. South Winds 15 to 25 Mph.

Tonight 5 Sep Eastern San Gabriel Mountains

Mostly clear in the Evening, becoming mostly cloudy with a slight chance of Showers after midnight. Lows in the mid 50s to mid 60s. South Winds 15 to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

September Temperature

Brackett Field Airport (15.5 miles)

  • Lowest 2 September, 2026

    60.8 °F

  • Average September

    75.9 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Brackett Field Airport (15.5 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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