Tennant Weather Forecast

    • 39
    • 70

    Chance Thunderstorms

    • 41
    • 68

    Chance Rain Showers

    • 43
    • 74

    Sunny

    • 46
    • 79

    Mostly Sunny

    • 47
    • 81

    Mostly Sunny

    • 46
    • 80

    Mostly Sunny

Today 16 Sep North Central and Southeast Siskiyou County

Mostly cloudy early this morning then becoming partly cloudy. Chance of Showers early this Morning, then slight chance of Thunderstorms in the late morning and afternoon. Highs in the lower 60s to lower 70s. Northeast Winds 5 to 10 Mph shifting to the southeast late this afternoon. Chance of precipitation 40 percent.

Tonight 16 Sep North Central and Southeast Siskiyou County

Partly cloudy. A 20 percent chance of Thunderstorms in the evening. Lows in the lower to mid 40s. Northwest Winds around 5 Mph shifting to the west well after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tennant Temperature Statistics

September Temperature

Mount Shasta (28 miles)

  • Lowest 4 September, 2026

    33.7 °F

  • Average September

    58.1 °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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