High humidity could lead to many 100-plus degree days when accounting for the heat index, forecasters suggest.

Iowans should prepare for a warmer-than-average summer through August, according to the latest climate outlook from the National Oceanic and Atmospheric Administration (NOAA).

Weather modeling for the Midwest, covering July through September, consistently forecasts an increased likelihood of above-normal temperatures across the entire state.

“More heat is likely on its way for the Midwest, and it’s likely going to be warmer than normal,” said Jeff...