Grass Valley Lake Weather Forecast

    • 41
    • 57

    Mostly Sunny

    • 43
    • 58

    Sunny

    • 45
    • 62

    Mostly Sunny

    • 43
    • 60

    Mostly Cloudy

    • 38
    • 48

    Chance Rain Showers

    • 37
    • 50

    Partly Sunny

    • 38
    • 53

    Partly Sunny

Today 6 Feb San Bernardino County Mountains

Mostly sunny this morning. Becoming partly cloudy. Highs 47 to 56 above 6000 feet to 55 to 64 below 6000 feet. Areas of Winds south to 10 Mph.

Tonight 6 Feb San Bernardino County Mountains

Mostly clear. Colder. Lows 27 to 37 above 6000 feet to 38 to 47 below 6000 feet. Areas of Winds east 10 Mph.

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Grass Valley Lake Temperature Statistics

February Temperature

San Bernardino Intl. Airport (11.8 miles)

  • Lowest 3 February, 2026

    47.1 °F

  • Average February

    62.6 °F

  • Highest 4 February, 2026

    86 °F

Climate (2021–Present)

San Bernardino Intl. Airport (11.8 miles)

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  • Average Low 2021–2026

    54.1 °F

  • Average 2021–2026

    63.1 °F

  • Average High 2021–2026

    80.3 °F
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