Tennant Weather Forecast

    • 51
    • 90

    Sunny

    • 55
    • 88

    Increasing Clouds

    • 48
    • 84

    Partly Sunny

    • 43
    • 81

    Sunny

    • 46
    • 83

    Mostly Sunny

    • 46
    • 83

    Mostly Sunny

    • 45
    • 82

    Mostly Sunny

Today 19 Aug North Central and Southeast Siskiyou County

Sunny. Highs in the lower 80s to lower 90s. Southwest Winds 5 to 10 Mph.

Tonight 19 Aug North Central and Southeast Siskiyou County

Clear. Lows in the lower 50s to lower 60s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tennant Temperature Statistics

August Temperature

Mount Shasta (28 miles)

  • Lowest 16 August, 2026

    43.6 °F

  • Average August

    71.6 °F

  • Highest 7 August, 2026

    98.7 °F

Climate (2021–2026)

Mount Shasta (28 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    65.8 °F
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