Grass Valley Weather Forecast

    • 59
    • 90

    Mostly Sunny

    • 62
    • 89

    Partly Sunny

    • 62
    • 89

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

    • 54
    • 78

    Partly Sunny

    • 51
    • 71

    Partly Sunny

Today 22 Sep Motherlode

Mostly sunny. Highs 83 to 93. Prevailing east Winds up to 10 Mph shifting to the southwest in the afternoon.

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  • Temperature Real-Time

Grass Valley Temperature Statistics

September Temperature

Nevada County Air Park (3.1 miles)

  • Lowest 19 September, 2021

    51.8 °F
  • Average September

    76.4 °F
  • Highest 7 September, 2021

    98.6 °F

Climate (2011–Present)

Nevada County Air Park (3.1 miles)

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  • Average Low 2011–Present

    52.2 °F
  • Average 2011–Present

    60.4 °F
  • Average High 2011–Present

    68.2 °F
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