Ashurst Lake Weather Forecast

    • 50
    • 80

    Mostly Sunny

    • 51
    • 79

    Mostly Cloudy

    • 47
    • 70

    Slight Chance Rain Showers

    • 45
    • 72

    Partly Sunny

    • 47
    • 74

    Mostly Sunny

    • 49
    • 78

    Partly Sunny

Today 17 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Sunny. Highs 80 to 90. Light Winds becoming southeast around 10 Mph in the afternoon.

Tonight 17 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Clear in the evening then becoming partly cloudy. Lows 45 to 55. Light Winds.

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Ashurst Lake Temperature Statistics

September Temperature

Alturas (54.7 miles)

  • Lowest 13 September, 2025

    41 °F

  • Average September

    66.3 °F

  • Highest 1 September, 2025

    91 °F

Climate (2020–Present)

Alturas (54.7 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    49.1 °F

  • Average High 2020–2025

    64.4 °F
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