Green Tank Reservoir Weather Forecast

    • 34
    • 59

    Increasing Clouds

    • 34
    • 63

    Mostly Sunny

    • 39
    • 67

    Mostly Sunny

    • 28
    • 56

    Chance Rain

    • 30
    • 52

    Mostly Sunny

    • 32
    • 57

    Partly Sunny

Today 16 Oct Modoc County

Partly cloudy in the morning then becoming sunny. Highs in the mid 50s to lower 60s. North Winds around 5 Mph.

Tonight 16 Oct Modoc County

Partly cloudy. Lows in the lower to mid 30s. North Winds around 5 Mph.

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Green Tank Reservoir Temperature Statistics

October Temperature

Alturas (24.2 miles)

  • Lowest 11 October, 2025

    30.9 °F

  • Average October

    50.2 °F

  • Highest 7 October, 2025

    73 °F

Climate (2020–Present)

Alturas (24.2 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    49.1 °F

  • Average High 2020–2025

    64.3 °F
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