Tennant Weather Forecast

    • 36
    • 60

    Chance Rain Showers

    • 39
    • 66

    Mostly Sunny

    • 34
    • 61

    Rain Showers Likely

    • 38
    • 68

    Mostly Sunny

    • 41
    • 74

    Partly Sunny

    • 43
    • 76

    Mostly Sunny

Today 4 Sep North Central and Southeast Siskiyou County

Partly cloudy. A 10 percent chance of Thunderstorms in the afternoon. Highs in the lower 50s to lower 60s. South Winds around 5 Mph shifting to the southwest in the afternoon.

Tonight 4 Sep North Central and Southeast Siskiyou County

Partly cloudy with a chance of rain Showers and slight chance of Thunderstorms in the Evening, then mostly clear after midnight. Lows in the mid 30s to mid 40s. West Winds 5 to 10 Mph shifting to the northwest after Midnight, then shifting to the east well after midnight. Chance of precipitation 30 percent.

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Tennant Temperature Statistics

September Temperature

Mount Shasta (28 miles)

  • Lowest 1 September, 2026

    46.9 °F

  • Average September

    57.1 °F

  • Highest 1 September, 2026

    66 °F

Climate (2021–2026)

Mount Shasta (28 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    65.8 °F
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