Nine Springs Reservoir Weather Forecast

    • 35
    • 66

    Sunny

    • 40
    • 73

    Sunny

    • 40
    • 77

    Mostly Sunny

    • 41
    • 73

    Mostly Sunny

    • 42
    • 73

    Mostly Sunny

    • 44
    • 78

    Mostly Sunny

    • 44
    • 79

    Mostly Sunny

Today 13 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Sunny. Highs 68 to 78. Light Winds becoming northwest 10 to 15 Mph in the afternoon.

Tonight 13 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Clear. Lows 32 to 42. North Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nine Springs Reservoir Temperature Statistics

September Temperature

Alturas (41.6 miles)

  • Lowest 10 September, 2026

    47.6 °F

  • Average September

    69.8 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Alturas (41.6 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    64.7 °F
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