Summer temperatures · Illinois and Iowa
How hot does Quad Cities get in summer?
Quad Cities right now
38°FClear skies
- Today42°F / 33°FClear skies
- Tomorrow46°F / 28°FClear skies
- Monday50°F / 31°FClear skies
Blue sky. Suspiciously nice.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Quad Cities averages highs around 85°F and lows around 63°F.
About 22 days a year reach 90°F or hotter, and a day at 100°F comes along less than once a year. About 99 days a year get to 80°F or warmer. That makes it the 62nd coolest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 46°F.
The Quad Cities average summer highs around 85°F, which the Mississippi takes calmly while everyone on its banks fans themselves.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 85°F |
|---|---|
| Average summer low | 63°F |
| Days a year at 80°F or warmer | 99 |
| Days a year at 90°F or hotter | 22 |
| Days a year at 100°F or hotter | fewer than one |
| Average winter high, for comparison | 35°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Columbus, Ohio: highs around 84°F, lows around 64°F
- Reno, Nevada: highs around 90°F, lows around 57°F
- Asheville, North Carolina: highs around 84°F, lows around 63°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00014923.