Siskiyou Mountain Park Weather Forecast

    • 52
    • 84

    Mostly Sunny

    • 53
    • 85

    Sunny

    • 53
    • 85

    Mostly Sunny

    • 52
    • 85

    Mostly Sunny

    • 44
    • 76

    Chance Rain

    • 45
    • 66

    Chance Rain

Today 21 May Jackson County

Sunny. Highs in the mid 80s to lower 90s in the Valleys and in the mid 70s to lower 80s at higher Elevations. Light Winds becoming north 5 to 10 Mph in the late morning and afternoon.

Tonight 21 May Jackson County

Mostly clear. Lows around 50. Northwest Winds 10 to 15 Mph decreasing to around 5 Mph after Midnight, then shifting to the north well after midnight.

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  • Temperature Real-Time

Siskiyou Mountain Park Temperature Statistics

May Temperature

Montague Siskiyou County Airport (28.6 miles)

  • Lowest 14 May, 2026

    34.6 °F

  • Average May

    60.4 °F

  • Highest 12 May, 2026

    89.7 °F

Climate (2021–Present)

Montague Siskiyou County Airport (28.6 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    69.2 °F
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