Mapes Reservoir Weather Forecast

    • 27
    • 53

    Increasing Clouds

    • 21
    • 44

    Mostly Sunny

    • 20
    • 42

    Sunny

    • 25
    • 46

    Mostly Cloudy

    • 26
    • 46

    Mostly Cloudy

    • 31
    • 50

    Mostly Cloudy

Today 22 Jan Modoc County

Partly cloudy then becoming sunny in the late morning and early afternoon then becoming partly cloudy. Highs in the lower to mid 50s. Northeast Winds around 5 Mph shifting to the northwest in the late morning and afternoon.

Tonight 22 Jan Modoc County

Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 20s to lower 30s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mapes Reservoir Temperature Statistics

January Temperature

Alturas (13 miles)

  • Lowest 9 January, 2026

    9 °F

  • Average January

    37.9 °F

  • Highest 14 January, 2026

    59 °F

Climate (2021–Present)

Alturas (13 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    64.5 °F
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