Lake Arrowhead Weather Forecast

    • 70
    • 89

    Chance Thunderstorms

    • 73
    • 89

    Chance Rain Showers

    • 73
    • 90

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

    • 68
    • 91

    Chance Thunderstorms

    • 64
    • 83

    Slight Chance Rain Showers

Today 18 Sep Clay

Sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southwest Winds around 5 Mph. Chance of rain 30 percent.

Tonight 18 Sep Clay

Partly cloudy with a slight chance of Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the upper 60s. East Winds around 5 Mph. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Arrowhead Temperature Statistics

September Temperature

Kickapoo Downtown Airport (11.8 miles)

  • Lowest 8 September, 2025

    59.9 °F

  • Average September

    77.2 °F

  • Highest 4 September, 2025

    95.9 °F

Climate (2020–Present)

Kickapoo Downtown Airport (11.8 miles)

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

  • Average Low 2020–2025

    54 °F

  • Average 2020–2025

    65.1 °F

  • Average High 2020–2025

    77.1 °F
Get WillyWeather+ to remove ads