Round Lake Beach Weather Forecast

    • 68
    • 81

    Rain Showers

    • 70
    • 89

    Thunderstorms

    • 65
    • 86

    Rain Showers Likely

    • 63
    • 83

    Mostly Sunny

    • 68
    • 88

    Mostly Sunny

    • 70
    • 90

    Chance Thunderstorms

    • 63
    • 85

    Chance Thunderstorms

Today 10 Jul Lake

Mostly sunny in the Morning, then becoming partly cloudy. A slight chance of Showers and Thunderstorms late in the afternoon. Highs in the lower 80s Inland, but only in the mid 70s near the lake. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 10 Jul Lake

Scattered Showers and Thunderstorms early in the Evening, then Showers and numerous Thunderstorms. Some Thunderstorms may produce heavy rainfall in the evening. Some Thunderstorms may produce heavy rainfall after midnight. Lows in the upper 60s. East Winds around 10 Mph, becoming southeast. Chance of precipitation 80 percent.

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Round Lake Beach Temperature Statistics

July Temperature

Chicago/Waukegan Regional Airport (11.8 miles)

  • Lowest 7 July, 2025

    64 °F
  • Average July

    76.4 °F
  • Highest 5 July, 2025

    93 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (11.8 miles)

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  • Average Low 2020–2025

    42.2 °F
  • Average 2020–2025

    51 °F
  • Average High 2020–2025

    59.5 °F
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