June 2025 Overview – Midwestern Regional Climate Center

Temperature

The average June temperature for the Midwest was 70.6°F, which was 1.6 °F above the 1991-2020 normal (Figure 1). Temperatures were near normal in the northwest portion of the region while elsewhere had temperatures 1 to 4°F above normal (Figure 2). Statewide average temperatures ranged from 0.3°F above normal in Minnesota to 2.6°F above normal in Ohio. The first half of June saw near- to slightly below-average temperatures across the region (Figure 3). Conditions flipped mid-month, with warm weather locking into place across the region for the second half of June (Figure 4). A notable humid heat wave blanketed the central and lower Midwest from June 21-28 (details below). Numerous long-running weather stations in northern Illinois, Indiana, Michigan, Ohio, and Kentucky recorded a top 10 warmest June (Figure 5). In southern Indiana, Shoals recorded the 2nd warmest June in 109 years. Indianapolis (IN), Rockford (IL), Columbus (OH), Lansing (MI), and many other locations east of the Mississippi River set a new June record for consecutive days with low temperatures at/above 70°F (Figure 6).

Precipitation

June precipitation totaled 5.13 inches for the Midwest, which was 0.59 inches above normal, or 113 percent of normal (Figure 1). Across the region, precipitation was generally at or above normal with notable exceptions in portions of Illinois, central Michigan, and northern Minnesota where precipitation was 50-75 percent of normal (Figure 7). Rainfall was 175-225 percent of normal in south-central Missouri, central Minnesota, northern Wisconsin, and northern Michigan. Statewide precipitation totals ranged from 0.58 inches below normal in Illinois to 1.55 inches above normal in Missouri (Figure 1). In central Missouri, Rolla had its 2nd wettest June in 111 years with 12.98 inches of rain, which is 8.61 inches above normal. Canby, in southwest Minnesota, measured a record-setting 12.27 inches of rainfall for June along with their wettest June day since 1887 when 3.9 inches fell on June 29. In central Ohio, Circleville had its wettest June in 103 years with 10.14 inches of rain.

Drought

Overall, just 6 percent of the Midwest was in drought and 23 percent was classified as abnormally dry according to the U.S. Drought Monitor in late June (Figure 8). The lower Midwest remained free of abnormal dryness or drought all month. Conditions improved slightly during June in the central Midwest and around the southern Lake Michigan area. Scattered pockets of abnormal dryness or drought lingered across the upper Midwest.

Severe Weather Outbreak – June 18

Several hundred straight-line wind reports reaching 70-80+ mph and at least 21 tornadoes touched down across Illinois, Indiana, Michigan, and Ohio on June 18 (Figure 9). A 79-mph wind gust in Muncie, Indiana uprooted a tree, which fell onto a mobile home. An 81-mph wind gust was reported at Lorain County Airport in Ohio. An EF-2 tornado with estimated peak winds of 125 mph cut a 7-mile path near Literberry, Illinois and caused significant damage to a farmstead and flattened corn. This potent weather system also dropped 2 to 3 inches of rainfall in the Chicago area and up to 4 inches of rainfall across a wide swath of southeast Michigan.

Humid Heat Wave – June 21-28

A hot, humid air mass brought very high temperatures and heat index values to the Midwest in late June. The lower Midwest was affected for over a week, while the heat lasted just a few days across the upper Midwest. Most locations across the lower Midwest had 6 to 9 consecutive days with maximum air temperatures at or over 90°F. The high air temperatures paired with dew point values over 70°F to create oppressive heat index values. The Minneapolis Crystal Airport measured a 108°F heat index on June 21 and a 107°F heat index on June 22 before temperatures moderated. Further south, the heat index in Terre Haute, Indiana, reached or exceeded 100°F daily from June 21-28, with a maximum heat index of 108°F on June 25. Overnight low temperatures during the heat wave were notably high too, putting people, pets, and plants at an elevated risk of heat stress. The daily low temperature in St. Louis, Missouri, remained at or above 79°F from June 21-26, which tied the record for most consecutive days at/above that threshold. Most locations across the lower Midwest maintained overnight temperatures at or above 72°F for the duration of the heat wave.