Heat in Minnesota

Events

400

Deaths

14

Injuries

14

Damage

None recorded

• Heat in Minnesota, August 4 to 8, 20015 deaths · 42 eventsAn extensive heat wave persisted for five days and resulted in five fatalities in Minneapolis and its suburbs. All deaths occurred in Hennepin County and were determined by the county medical examiner.
• Heat in Minnesota, August 7 to 8, 20015 deaths · 1 eventFive people died in a two-day heat wave, during which high temperatures of 91 degrees and heat indexes of 101 were reached. The victims, all in the Duluth area, included 4 males and 1 female, ranging in age from 47 to 73.
• Heat in Minnesota, July 23 to 25, 19991 death · 42 eventsA massive upper ridge over the central and eastern U.S. enabled heat to build into Minnesota. Heat indices ranged from 95 to 110 the afternoon of the 23rd, 90 to 105 on the 24th, and climaxed at 95 to 116 on the 25th before a cold front moved in.
• Heat in Minnesota, August 1, 20011 death · 42 eventsExcessive heat began on July 30 (see July Storm Data) and ended the morning of August 1 when showers and thunderstorms swept through the area, bringing lower temperatures and dewpoints.
• Heat in Minnesota, July 28 to 30, 19991 death · 7 eventsExcessive heat and humidity affected southeast Minnesota once again with afternoon highs reaching the middle 90s to 100. Heat indices ranged from 105 to as high as 120.
• Heat in Minnesota, August 29, 20131 death · 1 eventOne person passed away from heat related causes in Stewartville (Olmsted County) during a heat wave at the end of August. The victim had spent the day working in the yard and the combination of the heat and prescription medications are believed to have lead to the death.
• Heat in Minnesota, September 1, 202214 injured · 1 eventA high school cross country meet was held near Stewartville (Olmsted County) on September 1st. Fourteen runners needed treatment for heat exhaustion with four of them transported to a hospital for additional aid.
• Heat in Minnesota, July 29 to 30, 199942 eventsLess than one week after the first heat wave, central and south central Minnesota were belted with even greater heat, especially on the 30th. The morning of the 29th started with lows in the 70s and dewpoints in the middle 60s to middle 70s, producing heat indices from 70 to 85.
• Heat in Minnesota, July 30 to 31, 200142 eventsA heat wave began on the 30th and persisted until August 1 (see August Storm Data for information regarding August 1).
• Heat in Minnesota, July 30 to 31, 200642 eventsTemperatures topped out near 100 degrees across much of central and southern Minnesota during the afternoon hours of the 30th and 31st, with maximum heat indices ranging from 105 on the 30th, to 110 on the 31st.
• Heat in Minnesota, August 4 to 5, 200113 eventsWith temperatures in the 90s and dew points in the 70s, heat indices rose to around 115.
• Excessive Heat and Heat in Minnesota, August 25 to 26, 202411 eventsA strong ridge of high pressure locked in very warm and extremely humid conditions. Dew points in the upper 70s and lower 80s combined with temperatures in the upper 80s to lower 90s to produce daily heat index values from 100 to 120 degrees.
• Heat in Minnesota, August 4 to 5, 20018 eventsHeat indices rose to around 115 degrees, with temperatures in the 90s and dew points in the 70s.
• Excessive Heat and Heat in Minnesota, July 20, 20168 eventsVery warm air in the 80s and lower 90s, combined with dew point temperatures in the low 70s to around 80 degrees, resulted in widespread heat indices of 95 to 105 degrees across parts of east central Minnesota on July 20th.
• Excessive Heat and Heat in Minnesota, June 29, 20198 eventsOppressive temperatures in the mid 90's to around 100 degrees along with dew point readings in the mid to upper 70's produced very dangerous heat conditions with heat index readings in excess of 105 degrees for much of the afternoon and early evening.
• Heat in Minnesota, June 30, 20198 eventsWith temperatures peaking in the mid to upper 90's and dew points in the lower to mid 70's, heat index values ranged from 100 to 108 during the afternoon and early evening hours.
• Excessive Heat and Heat in Minnesota, August 19, 20238 eventsAn expanding upper-level ridge across the southern and central U.S. pushed heat into the region, as moisture pooled just ahead of an advancing frontal zone. The combination of heat and higher dewpoints resulted in afternoon and early evening heat indices from 100 to 115 degrees.
• Excessive Heat and Heat in Minnesota, July 13, 20248 eventsVery warm temperatures with highs in the lower to mid 90s paired with oppressive dew point readings in the upper 70s to lower 80s produced afternoon and evening heat indices generally from 100 to 115 degrees with little overnight recovery.
• Excessive Heat and Heat in Minnesota, July 27 to 28, 20258 eventsBeneath an expansive and strong, flat ridge aloft, extreme surface-based moisture returned near a diffuse warm frontal boundary on July 26 and lasted into the afternoon of July 28.
• Excessive Heat and Heat in Minnesota, June 29, 20268 eventsA large high pressure system parked over the Mississippi River Valley, bringing several days of hot, southerly flow across the region.
• Heat in Minnesota, July 4 to 5, 19997 eventsAfternoon temperatures reaching 95 to 100 combined with high humidity levels caused heat indices of 105 to 115. Even though there were a few cases of heat exhaustion reported, there were no deaths directly related to the excessive heat and humidity.
• Heat in Minnesota, July 23 to 25, 19997 eventsFor three consecutive days, afternoon highs reached into the 90s, while heat indices ranged from 105 to 115. No deaths directly related to the excessive heat and humidity were reported.
• Heat in Minnesota, July 31, 20017 eventsTemperatures in the middle 90s combined with high humidity caused dangerous heat indices of 105 to 110. The excessive heat and humidity continued to affect southeast Minnesota through the first week and a half of August.
• Heat in Minnesota, August 1 to 8, 20017 eventsExcessive heat and humidity that began in July continued through the early part of August. Afternoon temperatures in the middle 90s combined with high humidity produced dangerous heat indices of 105 to 115.
• Heat in Minnesota, July 16 to 20, 20117 eventsBroad surface high pressure developed and persisted over the Tennessee and Ohio River valleys during the five-day period from July 16th through the 20th. Daily high temperatures were in the 90s with dew points in the 70s and lower 80s, creating heat indices over 100.

Heat everywhereEvery kind of event in Minnesota

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.