Climate almanac
Rock Island
Illinois, US · 41.51°, -90.58°
What is the climate like in Rock Island?
Rock Island is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 19°F (-7°C). The wettest month is typically May and the driest is February; the year sees roughly 39 in of precipitation.
- Warmest monthJuly — average high 85°F (29°C)
- Coolest monthJanuary — average low 19°F (-7°C)
- Wettest monthMay (5.0 in)
- Driest monthFebruary (2.0 in)
- Annual precipitation39 in