Grass Valley Weather Forecast

    • 36
    • 55

    Becoming Sunny

    • 36
    • 59

    Sunny

    • 38
    • 57

    Partly Sunny

    • 39
    • 58

    Mostly Cloudy

    • 40
    • 60

    Mostly Cloudy

    • 40
    • 62

    Partly Sunny

Today 11 Dec Motherlode

Mostly sunny in the morning then becoming partly cloudy. Highs 54 to 60. Light Winds.

Tonight 11 Dec Motherlode

Clear. Lows 36 to 42. Prevailing northeast Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Valley Temperature Statistics

December Temperature

Nevada County Air Park (3.1 miles)

  • Lowest 8 December, 2023

    32 °F

  • Average December

    45.5 °F

  • Highest 5 December, 2023

    64.4 °F

Climate (2018–Present)

Nevada County Air Park (3.1 miles)

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  • Average Low 2018–2023

    51.7 °F

  • Average 2018–2023

    60.1 °F

  • Average High 2018–2023

    68.2 °F
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