Mundelein Weather Forecast

    • 59
    • 70

    Increasing Clouds

    • 60
    • 72

    Rain Showers

    • 57
    • 66

    Rain Showers Likely

    • 54
    • 63

    Chance Rain Showers

    • 54
    • 62

    Mostly Cloudy

    • 54
    • 66

    Mostly Cloudy

Today 18 Sep Lake

Partly cloudy in the Morning, then becoming mostly cloudy. Highs around 70. East Winds 10 to 15 Mph.

Tonight 18 Sep Lake

Cloudy. A slight chance of Showers and Thunderstorms late in the evening. Showers likely with a chance of Thunderstorms after Midnight, then Showers with Thunderstorms likely late. Locally heavy rainfall possible late. Lows in the upper 50s. East Winds 10 to 15 Mph. Chance of precipitation 90 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mundelein Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (10.6 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    74 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (10.6 miles)

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

  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.6 °F
Get WillyWeather+ to remove ads