Grass Valley Reservoir Weather Forecast

    • 41
    • 56

    Mostly Cloudy

    • 40
    • 52

    Rain Likely

    • 43
    • 51

    Rain

    • 32
    • 45

    Rain Showers

    • 31
    • 44

    Partly Sunny

    • 34
    • 48

    Partly Sunny

Today 29 Oct Southern Mountains

Mostly cloudy. Highs in the lower 40s.

Tonight 29 Oct Southern Mountains

Mostly cloudy. Lows in the mid 30s.

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  • Temperature Real-Time

Grass Valley Reservoir Temperature Statistics

October Temperature

St George Municipal Airport (25.5 miles)

  • Lowest 14 October, 2026

    46 °F

  • Average October

    67.9 °F

  • Highest 4 October, 2026

    96.1 °F

Climate (2021–2026)

St George Municipal Airport (25.5 miles)

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  • Average Low 2021–2026

    53.2 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    76.9 °F
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