Tennant Weather Forecast

    • 44
    • 78

    Increasing Clouds

    • 47
    • 79

    Mostly Sunny

    • 36
    • 72

    Chance Rain

    • 32
    • 56

    Chance Rain

    • 36
    • 61

    Chance Rain

    • 40
    • 69

    Slight Chance Rain

Today 23 May North Central and Southeast Siskiyou County

Sunny until early afternoon then becoming partly cloudy. Slight chance of Thunderstorms late this afternoon. Highs in the lower 70s to lower 80s. Southwest Winds 5 to 10 Mph.

Tonight 23 May North Central and Southeast Siskiyou County

Partly cloudy. Slight chance of Thunderstorms in the evening. Lows in the lower 40s to lower 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tennant Temperature Statistics

May Temperature

Mount Shasta (28 miles)

  • Lowest 17 May, 2026

    37.9 °F

  • Average May

    59.7 °F

  • Highest 11 May, 2026

    86.6 °F

Climate (2021–Present)

Mount Shasta (28 miles)

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  • Average Low 2021–2026

    39.7 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    66 °F
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