Crestline Weather Forecast

    • 52
    • 63

    Increasing Clouds

    • 48
    • 62

    Mostly Sunny

    • 49
    • 59

    Mostly Sunny

    • 50
    • 64

    Mostly Sunny

    • 48
    • 61

    Partly Sunny

    • 49
    • 60

    Partly Sunny

Today 13 Dec San Bernardino County Mountains

Mostly sunny. Highs 56 to 65 above 6000 feet to 63 to 72 below 6000 feet. Light Winds.

Tonight 13 Dec San Bernardino County Mountains

Partly cloudy in the evening. Becoming mostly cloudy. Lows 35 to 45 above 6000 feet to 46 to 54 below 6000 feet. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crestline Temperature Statistics

December Temperature

San Bernardino Intl. Airport (10.6 miles)

  • Lowest 4 December, 2025

    40.3 °F

  • Average December

    57.2 °F

  • Highest 10 December, 2025

    87.8 °F

Climate (2020–Present)

San Bernardino Intl. Airport (10.6 miles)

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  • Average Low 2020–2025

    54 °F

  • Average 2020–2025

    63 °F

  • Average High 2020–2025

    80.2 °F
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