Chicago, IL – After a warm start to June across much of the Midwest, forecasters are increasingly confident that a cooler weather pattern will develop during the second half of the month.
According to the NOAA Climate Prediction Center and the National Weather Service, temperatures are expected to trend below seasonal averages across much of the Upper Midwest and Great Lakes region beginning around June 18 and continuing through at least June 26.
The latest outlook highlights the strongest signal for cooler-than-normal temperatures across Minnesota, Wisconsin, Michigan, northern Illinois, Iowa, northern Indiana and portions of Ohio. Forecast maps show the potential for a broad trough of cooler air to settle across the northern half of the United States, replacing the warmer pattern that has dominated much of early June.
For the first outlook period, covering June 18 through June 22, below-normal temperatures are favored throughout much of the Midwest. A second outlook covering June 20 through June 26 continues that trend, suggesting the cooler pattern may persist into the final full week of the month.
While temperatures are not expected to be unusually cold for June, many locations could experience several days with highs running below seasonal averages. Typical late-June high temperatures range from the 70s across northern portions of the region to the low and mid-80s farther south.
Meteorologists caution that the outlook does not eliminate the possibility of occasional warm days. Instead, it indicates that temperatures are more likely to average below normal over the forecast period.
The cooler pattern could provide relief from recent warmth and may reduce demand for air conditioning across parts of the Midwest and Great Lakes region.
Additional forecast updates are expected throughout the week as confidence increases regarding the timing and strength of the incoming cooler air mass.
