Harvey Mountain Weather Forecast

    • 36
    • 60

    Slight Chance Rain

    • 36
    • 57

    Rain

    • 29
    • 48

    Rain

    • 24
    • 48

    Mostly Sunny

    • 28
    • 53

    Partly Sunny

    • 28
    • 52

    Partly Sunny

Today 20 Oct Lassen-Eastern Plumas-Eastern Sierra Counties

Mostly cloudy. Slight chance of rain in the afternoon. Highs 62 to 72. Light Winds becoming southeast around 10 Mph in the afternoon.

Tonight 20 Oct Lassen-Eastern Plumas-Eastern Sierra Counties

Mostly cloudy with a slight chance of rain. Lows 32 to 42. Light Winds.

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Harvey Mountain Temperature Statistics

October Temperature

Alturas (56.5 miles)

  • Lowest 12 October, 2026

    15.7 °F

  • Average October

    55.6 °F

  • Highest 3 October, 2026

    89.7 °F

Climate (2021–2026)

Alturas (56.5 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    64.8 °F
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