Tennant Weather Forecast

    • 51
    • 83

    Slight Chance Thunderstorms

    • 50
    • 77

    Chance Rain Showers

    • 46
    • 76

    Mostly Sunny

    • 45
    • 75

    Sunny

    • 49
    • 81

    Mostly Sunny

    • 49
    • 79

    Chance Rain Showers

Today 18 Sep North Central and Southeast Siskiyou County

Partly cloudy this morning then becoming mostly cloudy. Highs in the mid 70s to mid 80s. Northeast Winds around 5 Mph shifting to the southeast late this afternoon.

Tonight 18 Sep North Central and Southeast Siskiyou County

Mostly cloudy with a 10 percent chance of Thunderstorms. Lows in the lower to mid 50s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

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Tennant Temperature Statistics

September Temperature

Mount Shasta (28 miles)

  • Lowest 15 September, 2025

    44.1 °F

  • Average September

    63.1 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Mount Shasta (28 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    65.7 °F
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