Round Mountain Airport Weather Forecast

    • 55
    • 82

    Sunny

    • 64
    • 84

    Mostly Sunny

    • 61
    • 90

    Mostly Sunny

    • 58
    • 88

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

Today 22 Aug Central Siskiyou County

Sunny. Highs in the lower 80s to lower 90s. South Winds around 5 Mph shifting to the west in the afternoon.

Tonight 22 Aug Central Siskiyou County

Clear. Lows in the lower to mid 50s. Northwest Winds 10 to 20 Mph shifting to the north 5 to 10 Mph late in the evening and overnight.

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Round Mountain Airport Temperature Statistics

August Temperature

Montague Siskiyou County Airport (20.5 miles)

  • Lowest 16 August, 2026

    47.6 °F

  • Average August

    75.5 °F

  • Highest 7 August, 2026

    104.6 °F

Climate (2021–2026)

Montague Siskiyou County Airport (20.5 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    69.1 °F
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