Tennant Weather Forecast

    • 38
    • 63

    Increasing Clouds

    • 40
    • 68

    Partly Sunny

    • 37
    • 66

    Mostly Sunny

    • 37
    • 68

    Mostly Sunny

    • 40
    • 73

    Mostly Sunny

    • 41
    • 75

    Mostly Sunny

Today 25 Sep North Central and Southeast Siskiyou County

Partly cloudy early this morning then clearing. Highs in the mid 50s to mid 60s. West Winds 10 to 15 Mph.

Tonight 25 Sep North Central and Southeast Siskiyou County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 30s to mid 40s. North Winds 10 to 15 Mph.

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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

    59.5 °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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