Climate almanac
Round Lake Beach
Illinois, United States · 42.37°, -88.09°
What is the weather like in Round Lake Beach in August?
In August, Round Lake Beach is typically 79°F (26°C) during the day and 66°F (19°C) at night. The month brings about 3.2 in (81 mm) of precipitation in total.
- Average high79°F (26°C)
- Average low66°F (19°C)
- Precipitation3.2 in (81 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)