Climate almanac
Round Lake Beach
Illinois, United States · 42.37°, -88.09°
What is the weather like in Round Lake Beach in May?
In May, Round Lake Beach is typically 65°F (18°C) during the day and 51°F (11°C) at night. The month brings about 4.9 in (123 mm) of precipitation in total.
- Average high65°F (18°C)
- Average low51°F (11°C)
- Precipitation4.9 in (123 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)