June 22-30, 2025

Temperatures

Average temperatures were above normal for most of the region (Figure 1). This was especially the case early in the period. In isolated spots along I-80, temperatures averaged nearly 10°F above normal for the week. Heading west and north, temperature anomalies decreased, and in Minnesota temperatures averaged near normal for the week.

Minimum temperatures averaged 5-10°F above normal for much of the region, but especially east of the Mississippi River (Figure 2). Parts of Lower Michigan were over 10°F above normal for the week.

Maximum temperatures were above normal across most states (Figure 3). Near-normal temperatures were observed over northern Wisconsin, while slightly below-normal maximum temperatures were seen over central Minnesota.

June Heat

Temperatures rose to record levels right as astronomical summer began, with just over 1,000 daily high temperature records broken throughout the final week of June (Figure 4). In Chicago, Illinois, maximum temperatures were at or above 94°F for four consecutive days, June 21-24, for the third time in June since records began in 1871. In Alpena, Michigan, temperatures rose to 97°F for two consecutive days, June 22-23, which were the warmest June temperatures since 2018 and the fourth time that temperatures had risen that high on consecutive days in June. In St. Louis, Missouri, temperatures were so warm that roads buckled, sending cars flying into the air.

Minimum temperatures also broke records. Alpena also set a record for the warmest minimum temperature ever observed in June since records began in 1916, with an observation of 79°F on June 23. In La Crosse, Wisconsin, minimum temperatures of 79°F or above were observed on two consecutive days, June 21-22, for the first time in June since records began in 1872. The 80°F observed minimum temperature on June 22 also tied the previous record for the warmest June minimum temperature ever observed in La Crosse.

Precipitation/Drought

Precipitation was over 200 percent of normal across much of Iowa, Minnesota, Michigan’s Upper Peninsula (UP), and Wisconsin (Figure 5). Much of this precipitation came as high pressure moved east toward the Ohio Valley and East Coast. Across Illinois, Indiana, Kentucky, Lower Michigan, and Ohio, precipitation was generally below normal, although portions of Lower Michigan and central Ohio were near normal.

Drought changed very little during the period as high pressure and hot temperatures kept precipitation at bay where it was needed most. Areas with D1 (moderate drought) and D2 (severe drought) saw little improvement (Figure 6). There was some improvement in D0 (abnormally dry) over Iowa and Missouri.

Severe Weather

There were 527 storm reports this week, 451 of which were wind reports (Figure 7). Severe storms brought 60+ mph wind gusts to Wisconsin on June 23, which caused one death in Brown County when a tree fell on a person.

There were 38 tornado reports, the vast majority of which occurred in Minnesota. Several EF0 and EF1 tornadoes occurred in southeast Minnesota on June 25. An EF1 Tornado spent 1.8 miles on the ground just northeast of Zumbro Falls, Minnesota, ripping the roof of a mobile home and knocking over farming implements. On June 28, eight more tornadoes occurred across the NWS Twin Cities County Warning Area, the longest of which was an EF1 that spent 7.3 miles on the ground, crossing Lake Waconia in the process. An EF1 tornado in Danvers, Minnesota, on June 28 knocked over three irrigation pivots and ripped through three turkey barns.