Grass Valley Reservoir Weather Forecast

    • 16
    • 40

    Mostly Sunny

    • 15
    • 29

    Mostly Sunny

    • 14
    • 37

    Mostly Sunny

    • 12
    • 26

    Mostly Sunny

    • 20
    • 38

    Partly Sunny

    • 18
    • 41

    Mostly Sunny

    • 18
    • 35

    Mostly Sunny

Today 17 Jan Southern Mountains

Sunny. Highs in the mid 30s.

Tonight 17 Jan Southern Mountains

Mostly clear. Lows 5 to 10 above.

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Grass Valley Reservoir Temperature Statistics

January Temperature

St George Municipal Airport (25.5 miles)

  • Lowest 15 January, 2025

    25 °F

  • Average January

    41.2 °F

  • Highest 4 January, 2025

    59 °F

Climate (2020–Present)

St George Municipal Airport (25.5 miles)

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  • Average Low 2020–2025

    52.1 °F

  • Average 2020–2025

    64.2 °F

  • Average High 2020–2025

    76.5 °F
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