Onion Valley Reservoir Weather Forecast

    • 50
    • 69

    Increasing Clouds

    • 53
    • 71

    Increasing Clouds

    • 53
    • 73

    Partly Sunny

    • 38
    • 65

    Breezy

    • 43
    • 60

    Mostly Cloudy

    • 40
    • 60

    Mostly Cloudy

    • 40
    • 59

    Mostly Sunny

Today 22 Sep Humboldt County

Sunny. Highs 64 to 74.

Tonight 22 Sep Humboldt County

Partly cloudy. Lows 47 to 53. North Winds up to 10 Mph.

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Onion Valley Reservoir Temperature Statistics

September Temperature

Winnemucca, Winnemucca Municipal Airport (72.7 miles)

  • Lowest 14 September, 2026

    32.6 °F

  • Average September

    62.1 °F

  • Highest 9 September, 2026

    90.6 °F

Climate (2021–2026)

Winnemucca, Winnemucca Municipal Airport (72.7 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    69 °F
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