Quad Cities — The summer of 2025 will be remembered across Illinois and the Midwest for its mix of heat, heavy rainfall and sticky humidity.
According to the National Weather Service Quad Cities office, the region averaged 1 to 2 degrees warmer than seasonal norms from June through August. Rainfall totals varied widely, coming in at 75% to 150% of normal across much of the area.
The Midwest Regional Climate Center’s maps show that much of Illinois, Iowa, and surrounding states leaned warmer than average, while rainfall patterns were uneven. Some counties experienced well above-normal rainfall, leading to periods of localized flooding, while others saw drier-than-expected stretches.
Meteorologists noted that this year’s summer climate followed a broader warming trend observed in recent decades. Higher temperatures paired with more frequent heavy rain events have stressed local agriculture and tested urban drainage systems across Illinois and neighboring states.
The weather service said many residents endured long stretches of uncomfortable humidity, making this summer feel hotter than the temperature numbers alone suggest. Despite this, rainfall totals for the three-month period stayed within a broad “normal” range when compared to long-term records, even though precipitation came in heavy bursts rather than steady rains.
With summer now officially in the books, forecasters are turning attention to September conditions and the outlook for the fall season, which could determine soil moisture levels and harvest impacts across the Midwest.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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