Mount Shasta Weather Forecast

    • 39
    • 70

    Sunny

    • 44
    • 76

    Mostly Sunny

    • 47
    • 80

    Mostly Sunny

    • 49
    • 84

    Mostly Sunny

    • 49
    • 84

    Mostly Sunny

    • 48
    • 82

    Mostly Sunny

    • 46
    • 81

    Mostly Sunny

Today 18 May South Central Siskiyou County

Sunny. Highs in the lower 60s to lower 70s. North Winds 5 to 10 Mph.

Tonight 18 May South Central Siskiyou County

Clear. Lows in the mid 30s to lower 40s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Shasta Temperature Statistics

May Temperature

Mount Shasta (0 miles)

  • Lowest 14 May, 2026

    39.7 °F

  • Average May

    60.5 °F

  • Highest 11 May, 2026

    86.6 °F

Climate (2021–Present)

Mount Shasta (0 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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