Grayslake Weather Forecast

    • 63
    • 79

    Chance Rain Showers

    • 64
    • 81

    Slight Chance Thunderstorms

    • 67
    • 82

    Rain Showers Likely

    • 67
    • 79

    Rain Showers Likely

    • 59
    • 76

    Mostly Sunny

    • 56
    • 73

    Slight Chance Thunderstorms

    • 59
    • 73

    Slight Chance Thunderstorms

Today 19 Sep Lake

Partly sunny. Chance of Showers and a slight chance of Thunderstorms in the afternoon. Highs in the lower 80s inland. But only in the upper 70s near the lake. South Winds 5 to 10 Mph. Chance of precipitation 30 percent.

Tonight 19 Sep Lake

Partly cloudy. Lows in the mid 60s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayslake Temperature Statistics

September Temperature

Chicago/Waukegan Regional Airport (10.6 miles)

  • Lowest 5 September, 2019

    51.1 °F
  • Average September

    66.6 °F
  • Highest 10 September, 2019

    88 °F

Climate (2010–Present)

Chicago/Waukegan Regional Airport (10.6 miles)

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  • Average Low 2010–Present

    41.4 °F
  • Average 2010–Present

    49.6 °F
  • Average High 2010–Present

    57.5 °F
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