Williams Lake Weather Forecast

    • 45
    • 70

    Chance Rain Showers

    • 48
    • 66

    Rain Showers Likely

    • 43
    • 70

    Mostly Cloudy

    • 41
    • 65

    Mostly Cloudy

    • 42
    • 66

    Mostly Cloudy

    • 44
    • 67

    Mostly Cloudy

Today 18 Sep Mason

Mostly sunny in the morning then becoming partly sunny. Highs around 70. Northeast Winds 5 to 10 Mph.

Tonight 18 Sep Mason

A chance of rain Showers in the Evening, then rain Showers likely after midnight. Lows in the mid 40s. Northeast Winds around 10 Mph becoming east with Gusts to around 20 Mph after midnight. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Williams Lake Temperature Statistics

September Temperature

Ludington, Mason County Airport (13 miles)

  • Lowest 14 September, 2026

    41 °F

  • Average September

    67.9 °F

  • Highest 1 September, 2026

    84.2 °F

Climate (2021–2026)

Ludington, Mason County Airport (13 miles)

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

  • Average Low 2021–2026

    39.8 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    56.5 °F
Get WillyWeather+ to remove ads