Union Valley Reservoir Weather Forecast

    • 44
    • 57

    Mostly Cloudy

    • 45
    • 65

    Mostly Sunny

    • 43
    • 63

    Sunny

    • 46
    • 69

    Mostly Sunny

    • 48
    • 72

    Chance Rain

    • 52
    • 71

    Chance Rain

    • 50
    • 71

    Chance Rain

Today 4 Sep Sierra Nevada of El Dorado and Amador Counties Between 3000-5000 ft Including Highway 50

Mostly cloudy. Patchy fog early in the morning. A chance of rain in the Morning, then a slight chance of rain in the afternoon. Highs 58 to 68. Southwest Winds up to 10 Mph with Gusts to around 20 Mph.

Tonight 4 Sep Sierra Nevada of El Dorado and Amador Counties Between 3000-5000 ft Including Highway 50

Mostly clear. Lows 45 to 54. Light Winds.

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Union Valley Reservoir Temperature Statistics

September Temperature

Placerville Airport (21.1 miles)

  • Lowest 1 September, 2026

    48.2 °F

  • Average September

    58 °F

  • Highest 2 September, 2026

    71.6 °F

Climate (2021–2026)

Placerville Airport (21.1 miles)

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  • Average Low 2021–2026

    52.6 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    69.1 °F
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