Crestline Weather Forecast

    • 69
    • 82

    Slight Chance Thunderstorms

    • 65
    • 77

    Chance Thunderstorms

    • 61
    • 73

    Mostly Sunny

    • 59
    • 70

    Partly Sunny

    • 61
    • 71

    Mostly Sunny

    • 62
    • 73

    Mostly Sunny

Today 10 Aug San Bernardino County Mountains

Mostly sunny this Morning, then partly cloudy with a chance of Showers and Thunderstorms this afternoon. Highs 76 to 86 above 6000 feet to 84 to 94 below 6000 feet. Areas of Winds south 10 to 15 Mph. Gusts to 30 Mph this afternoon. Chance of measurable precipitation 40 percent.

Tonight 10 Aug San Bernardino County Mountains

Partly cloudy. Cooler. Lows 52 to 62 above 6000 feet to 61 to 71 below 6000 feet. Areas of Winds south 10 to 15 Mph. Gusts to 30 Mph in the evening.

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Crestline Temperature Statistics

August Temperature

San Bernardino Intl. Airport (10.6 miles)

  • Lowest 5 August, 2026

    66.7 °F

  • Average August

    80.1 °F

  • Highest 1 August, 2026

    104 °F

Climate (2021–2026)

San Bernardino Intl. Airport (10.6 miles)

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  • Average Low 2021–2026

    54.2 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    80.3 °F
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