Grayslake Weather Forecast

    • 19
    • 26

    Snow

    • 9
    • 24

    Chance Snow

    • 14
    • 24

    Chance Snow

    • 30
    • 35

    Rain/Snow

    • 14
    • 36

    Chance Rain/Snow

    • 9
    • 26

    Chance Snow

Today 6 Dec Lake

Mostly cloudy. Near steady temperature in the mid 20s. Northwest Winds 5 to 10 Mph.

Tonight 6 Dec Lake

Mostly cloudy. A slight chance of snow in the Evening, then snow likely after midnight. Snow accumulation of 1 to 3 Inches possible. Near steady temperature around 20. Light and variable Winds, becoming north around 5 Mph after midnight. Chance of precipitation 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayslake Temperature Statistics

December Temperature

Chicago/Waukegan Regional Airport (10.6 miles)

  • Lowest 1 December, 2025

    9 °F

  • Average December

    21.8 °F

  • Highest 3 December, 2025

    30.9 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (10.6 miles)

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

  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    59.7 °F
Get WillyWeather+ to remove ads