Crestline Weather Forecast

    • 45
    • 55

    Mostly Sunny

    • 45
    • 59

    Mostly Sunny

    • 47
    • 57

    Mostly Sunny

    • 48
    • 62

    Mostly Sunny

    • 49
    • 64

    Sunny

    • 49
    • 63

    Sunny

    • 48
    • 63

    Mostly Sunny

Today 6 Dec San Bernardino County Mountains

Sunny. Highs 52 to 60 above 6000 feet to 57 to 65 below 6000 feet. Areas of Winds northwest to 10 Mph. Near ridge Tops and along desert Slopes, Areas of Winds west 10 to 15 Mph becoming north this afternoon.

Tonight 6 Dec San Bernardino County Mountains

Mostly clear this evening. Becoming partly cloudy. Lows 30 to 40 above 6000 feet to 40 to 48 below 6000 feet. Areas of Winds northwest 10 Mph becoming east overnight.

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Crestline Temperature Statistics

December Temperature

San Bernardino Intl. Airport (10.6 miles)

  • Lowest 4 December, 2025

    40.3 °F

  • Average December

    51.4 °F

  • Highest 1 December, 2025

    71.6 °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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