Grayslake Weather Forecast

    • 68
    • 93

    Thunderstorms Likely

    • 62
    • 79

    Thunderstorms Likely

    • 58
    • 75

    Partly Sunny

    • 60
    • 80

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

    • 63
    • 83

    Mostly Sunny

Today 20 Jul Lake

Partly sunny. Showers and Thunderstorms likely in the afternoon. Highs in the lower 90s. Peak afternoon heat index Readings 105 to 110. Southwest Winds 10 to 20 Mph. Chance of precipitation 60 percent.

Tonight 20 Jul Lake

Showers and Thunderstorms likely. Lows in the upper 60s. East Winds 5 to 10 Mph in the evening becoming northeast and increasing to 10 to 20 Mph after midnight. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayslake Temperature Statistics

July Temperature

Chicago/Waukegan Regional Airport (10.6 miles)

  • Lowest 8 July, 2019

    55.9 °F
  • Average July

    73.8 °F
  • Highest 10 July, 2019

    93 °F

Climate (2010–Present)

Chicago/Waukegan Regional Airport (10.6 miles)

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  • Average Low 2010–Present

    40.4 °F
  • Average 2010–Present

    48.6 °F
  • Average High 2010–Present

    56.5 °F
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