Tennant Weather Forecast

    • 41
    • 76

    Mostly Sunny

    • 44
    • 77

    Partly Sunny

    • 41
    • 75

    Partly Sunny

    • 33
    • 63

    Partly Sunny

    • 37
    • 65

    Partly Sunny

    • 34
    • 64

    Mostly Sunny

Today 22 Sep North Central and Southeast Siskiyou County

Partly cloudy this morning then becoming sunny. Highs in the lower 70s to lower 80s. West Winds 5 to 10 Mph.

Tonight 22 Sep North Central and Southeast Siskiyou County

Mostly clear. Lows in the lower to mid 40s. Northwest Winds around 5 Mph shifting to the northeast well after midnight.

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Tennant Temperature Statistics

September Temperature

Mount Shasta (28 miles)

  • Lowest 4 September, 2026

    33.7 °F

  • Average September

    58.6 °F

  • Highest 9 September, 2026

    90.6 °F

Climate (2021–2026)

Mount Shasta (28 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    65.7 °F
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