Tennant Weather Forecast

    • 36
    • 57

    Partly Sunny

    • 35
    • 61

    Mostly Sunny

    • 33
    • 59

    Sunny

    • 34
    • 59

    Mostly Sunny

    • 32
    • 59

    Partly Sunny

    • 34
    • 51

    Mostly Cloudy

Today 9 Dec North Central and Southeast Siskiyou County

Partly cloudy in the morning then becoming sunny. Highs in the lower to mid 50s. West Winds 10 to 15 Mph.

Tonight 9 Dec North Central and Southeast Siskiyou County

Partly cloudy. Patchy fog. Lows in the mid 30s to lower 40s. Northwest Winds 5 to 10 Mph.

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Tennant Temperature Statistics

December Temperature

Mount Shasta (28 miles)

  • Lowest 1 December, 2025

    27 °F

  • Average December

    40.3 °F

  • Highest 6 December, 2025

    57 °F

Climate (2020–Present)

Mount Shasta (28 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    65.5 °F
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