Steamy Iowa forecast calls for triple-digit heat indices
July 22nd, 2025 by Ric Hanson
(Radio Iowa) – Forecasters say Iowa is in for a string of hot, humid and MUGGY days. National Weather Service meteorologist Alexis Jimenez says most of the state will be cooking this afternoon, tomorrow, and likely daily into the weekend. “We’ll see highs probably in the low 90s,” Jimenez says, “but the bigger story will be how hot it will feel because of that humidity.” The combined heat and humidity creates a heat index, what some call a misery index, and it’s expected to feel like it’s at least 105 degrees in many Iowa communities during the afternoons, and in some places, it’ll feel like it’s even hotter.
“Portions of southeast Iowa especially will not only be hot during the day, but even overnight their lows probably won’t get much lower than 75 degrees,” Jimenez says, “so even at night, there won’t be a ton of relief.”
Today’s (Tuesday’s) leg of the statewide bicycle ride RAGBRAI is the longest of the week-long adventure, at nearly 74 miles from Estherville to Forest City. State softball and baseball tournaments are also underway.