Klamath River Weather Forecast

    • 50
    • 89

    Rain Showers

    • 44
    • 81

    Mostly Sunny

    • 49
    • 89

    Sunny

    • 52
    • 95

    Sunny

    • 49
    • 90

    Mostly Sunny

    • 48
    • 86

    Mostly Sunny

    • 49
    • 88

    Mostly Sunny

Today 13 Sep Central Siskiyou County

Sunny until early afternoon then becoming partly cloudy. Highs in the mid 70s to mid 80s. East Winds around 5 Mph shifting to the southwest this afternoon.

Tonight 13 Sep Central Siskiyou County

Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. Isolated Showers late this evening. Isolated Thunderstorms after midnight. Scattered Showers well after midnight. Lows in the lower to mid 50s. West Winds 5 to 10 Mph. Chance of precipitation 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Klamath River Temperature Statistics

September Temperature

Montague Siskiyou County Airport (14.3 miles)

  • Lowest 1 September, 2025

    48 °F

  • Average September

    69.3 °F

  • Highest 1 September, 2025

    95 °F

Climate (2020–Present)

Montague Siskiyou County Airport (14.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    54.2 °F

  • Average High 2020–2025

    69 °F
Get WillyWeather+ to remove ads