Grass Valley Reservoir Weather Forecast

    • 38
    • 61

    Mostly Sunny

    • 39
    • 63

    Mostly Sunny

    • 45
    • 68

    Partly Sunny

    • 45
    • 69

    Partly Sunny

    • 38
    • 64

    Partly Sunny

    • 39
    • 58

    Chance Rain Showers

Today 30 Apr Southern Mountains

Sunny in the Morning, then partly cloudy with a 20 percent chance of snow Showers in the afternoon. Highs in the upper 40s.

Tonight 30 Apr Southern Mountains

Mostly clear. Lows around 30.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Valley Reservoir Temperature Statistics

April Temperature

St George Municipal Airport (25.5 miles)

  • Lowest 18 April, 2026

    41 °F

  • Average April

    64.7 °F

  • Highest 8 April, 2026

    87.1 °F

Climate (2021–Present)

St George Municipal Airport (25.5 miles)

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  • Average Low 2021–2026

    52.9 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    76.9 °F
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