Callahan Weather Forecast

    • 62
    • 80

    Increasing Clouds

    • 60
    • 77

    Chance Rain Showers

    • 58
    • 75

    Slight Chance Thunderstorms

    • 58
    • 77

    Sunny

    • 60
    • 81

    Mostly Sunny

    • 57
    • 72

    Chance Rain Showers

Today 18 Sep Western Siskiyou County

Sunny in the Morning, then partly cloudy with a 10 percent chance of Thunderstorms in the afternoon. Highs in the mid 70s to mid 80s. Northeast Winds around 5 Mph shifting to the north late in the afternoon.

Tonight 18 Sep Western Siskiyou County

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the mid 50s to lower 60s. Northwest Winds around 5 Mph shifting to the east late in the evening and overnight. Chance of precipitation 20 percent.

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Callahan Temperature Statistics

September Temperature

Trinity Center (23.6 miles)

  • Lowest 14 September, 2025

    50 °F

  • Average September

    69.2 °F

  • Highest 1 September, 2025

    95 °F

Climate (2020–Present)

Trinity Center (23.6 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.5 °F
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