Quad Cities, Iowa/Illinois – Daily thunderstorm chances and rising temperatures are expected to define the week across eastern Iowa and western Illinois, with the hottest day likely arriving Thursday as highs approach 90 degrees. Drivers and outdoor workers should prepare for scattered storms and increasing humidity.
According to the National Weather Service Quad Cities office, isolated showers and thunderstorms could develop Tuesday afternoon, with coverage increasing to 30–50% by evening. Wednesday brings lower storm odds but higher heat, with temps ranging from 82 to 88 degrees and isolated storms possible in northwest Illinois.
Storms could become more widespread Thursday, mainly north of Interstate 80, alongside a surge in temperatures nearing 90°F. While rainfall totals should remain light, any slow-moving storms may still cause brief downpours or gusty winds.
On Friday, cooler temperatures are expected to arrive, especially north of I-80, where storm chances persist. Highs could dip to 70°F in the north, while southern parts of the region remain near 80°F.
Those with outdoor plans this week should stay weather-aware, especially during peak heat and storm windows. Storm chances linger into Friday evening, and additional alerts are possible as conditions evolve.
