Tennant Weather Forecast

    • 45
    • 84

    Becoming Sunny

    • 44
    • 79

    Mostly Sunny

    • 33
    • 65

    Mostly Sunny

    • 35
    • 62

    Mostly Sunny

    • 41
    • 70

    Mostly Sunny

    • 43
    • 73

    Mostly Sunny

Today 10 Sep North Central and Southeast Siskiyou County

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 70s to mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 10 Sep North Central and Southeast Siskiyou County

Clear. Lows in the mid 40s to lower 50s. Northwest Winds 5 to 10 Mph.

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Tennant Temperature Statistics

September Temperature

Mount Shasta (28 miles)

  • Lowest 4 September, 2026

    33.7 °F

  • Average September

    53.4 °F

  • Highest 7 September, 2026

    73.9 °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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