Mount Shasta Weather Forecast

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    Rain

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    Rain

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    Rain Likely

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    Rain Likely

Today 18 Dec South Central Siskiyou County

Mostly cloudy. Slight chance of rain early this Morning, then rain likely in the late morning and afternoon. Snow level 7000 feet this afternoon. Highs in the lower to mid 40s. Southwest Winds 10 to 20 Mph. Chance of rain 70 percent.

Tonight 18 Dec South Central Siskiyou County

Rain with freezing rain likely in the Evening, then Rain, freezing rain and snow after midnight. Snow may be heavy at Times after midnight. Snow level 6500 feet. Little or no snow accumulation. Lows in the lower 30s to lower 40s. South Winds 10 to 20 Mph with Gusts to around 35 Mph. Chance of precipitation 90 percent.

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Mount Shasta Temperature Statistics

December Temperature

Mount Shasta (0 miles)

  • Lowest 1 December, 2025

    27 °F

  • Average December

    41.3 °F

  • Highest 13 December, 2025

    64 °F

Climate (2020–Present)

Mount Shasta (0 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    65.6 °F
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