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.
Round Lake Beach Temperature Statistics
July Temperature
Chicago/Waukegan Regional Airport (11.8 miles)
Lowest 7 July, 2025
64 °FAverage July
76.4 °FHighest 5 July, 2025
93 °F
Climate (2020–Present)
Chicago/Waukegan Regional Airport (11.8 miles)
Average Low 2020–2025
42.2 °FAverage 2020–2025
51 °FAverage High 2020–2025
59.5 °F