Big Sage Reservoir Weather Forecast

    • 29
    • 39

    Rain/Snow

    • 32
    • 39

    Chance Rain/Snow

    • 23
    • 38

    Snow Likely

    • 18
    • 33

    Slight Chance Snow

    • 20
    • 39

    Mostly Sunny

    • 23
    • 44

    Mostly Sunny

Today 5 Jan Modoc County

Mostly cloudy. Patchy fog through the day. Chance of rain and snow this morning. Rain and snow likely this afternoon. Snow level 3900 feet rising to 4500 feet this afternoon. Snow accumulation of 1 to 2 Inches except 4 to 6 Inches in the warner Mountains. Highs in the mid 30s to lower 40s. South Winds 10 to 15 Mph. Chance of precipitation 70 percent.

Tonight 5 Jan Modoc County

Mostly cloudy. Patchy fog in the evening. Chance of Rain, snow and slight chance of light freezing rain in the Evening, then slight chance of light freezing rain after midnight. Snow level 4500 feet. Snow accumulation up to 1 inch except 2 to 4 Inches in the warner Mountains. Lows around 30. South Winds 10 to 15 Mph. Chance of precipitation 30 percent.

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Big Sage Reservoir Temperature Statistics

January Temperature

Alturas (9.3 miles)

  • Lowest 3 January, 2026

    37 °F

  • Average January

    43.3 °F

  • Highest 2 January, 2026

    51.1 °F

Climate (2021–Present)

Alturas (9.3 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    64.5 °F
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