Crestline Weather Forecast

    • 74
    • 87

    Chance Thunderstorms

    • 74
    • 84

    Chance Thunderstorms

    • 73
    • 84

    Chance Thunderstorms

    • 70
    • 81

    Chance Thunderstorms

    • 67
    • 77

    Chance Thunderstorms

    • 64
    • 75

    Chance Thunderstorms

Today 22 Aug San Bernardino County Mountains

Mostly sunny this Morning, then partly cloudy with a chance of Showers and a slight chance of Thunderstorms this afternoon. Highs 79 to 89 above 6000 feet to 88 to 97 below 6000 feet. Areas of Winds south to 10 Mph. Becoming 10 to 15 Mph this afternoon. Chance of measurable precipitation 30 percent.

Tonight 22 Aug San Bernardino County Mountains

Partly cloudy with a chance of Showers. A slight chance of Thunderstorms in the Evening, then a chance of Thunderstorms overnight. Cooler. Lows 55 to 65 above 6000 feet to 64 to 74 below 6000 feet. Areas of Winds west 10 to 15 Mph becoming southwest overnight. Chance of measurable precipitation 30 percent.

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Crestline Temperature Statistics

August Temperature

San Bernardino Intl. Airport (10.6 miles)

  • Lowest 18 August, 2025

    60.8 °F

  • Average August

    75.8 °F

  • Highest 7 August, 2025

    105.8 °F

Climate (2020–Present)

San Bernardino Intl. Airport (10.6 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    63.2 °F

  • Average High 2020–2025

    80.5 °F
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