Climate almanac
Rock Island
Illinois, United States · 41.51°, -90.58°
What is the weather like in Rock Island in May?
In May, Rock Island is typically 74°F (23°C) during the day and 54°F (12°C) at night. The month brings about 5.0 in (127 mm) of precipitation in total.
- Average high74°F (23°C)
- Average low54°F (12°C)
- Precipitation5.0 in (127 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)