The heat wave that gripped the Northeast and Midwest in late-June 2025 smashed records not just for a particular calendar day, but also anytime in June. In a few locations, it even tied or set new all-time records.
As The Weather Channel reports, hundreds of record highs were broken from the Plains to the East Coast June 22-24, 2025, according to the National Weather Service (NWS). Additional records were set in the East on June 25, but are not shown.
All-Time Records
- Augusta, Maine: Tied its all-time record high of 100 degrees on Tuesday in records dating to 1948.
- Plattsburgh, New York: Tied its all-time record high of 101 degrees Monday. On the shores of Lake Champlain, they reached 100 degrees for only the fourth time in their almost 80-year period of record. It was the first time they did so in almost 50 years, since an Aug. 1-2, 1975 heat wave.
- Alpena, Michigan: Their daily low of 79 degrees Monday topped their previous record of 77 set three other times in 1919, 1927 and 1948.
- Eau Claire, Wisconsin: Their daily low of 82 degrees Sunday topped their previous record of 81 set both on June 27, 1991 and July 20, 1932.
- Gaylord, Michigan: Their low of 78 degrees Sunday topped their previous record 77 set both on August 29, 1973 and July 7, 1973.
- Green Bay, Wisconsin: Tied their all-time hottest low of 79 degrees Sunday, which was previously set on July 4, 1897, and July 30, 1916. That was their hottest low in almost 109 years.
- Lansing, Michigan: Tied their all-time hottest low of 78 degrees Sunday, which was previously set on Aug. 1, 2006 and July 18, 1942.
- Wausau, Wisconsin: Tied their all-time hottest low of 78 degrees Sunday, which was previously set on July 4, 1999.
- Minneapolis-St. Paul had their record earliest in June 80-degree lows both Saturday (80) and Sunday (82).
June Monthly Records
Seven states in the Northeast preliminarily tied or broke June all-time record highs Monday into Tuesday, according to weather records expert Maxmiliano Herrera. That includes Connecticut, Maine, Maryland, Massachusetts, New Hampshire, Rhode Island and Vermont.
- New York’s all-time hottest June day was preliminarily set Wednesday at Baiting Hollow (103 degrees), according to Herrera.
- Boston’s high of 102 degrees Tuesday broke the city’s previous June record of 100 degrees. Providence, Rhode Island, also set a new June record by hitting 100 degrees.
- June records in the New York City area on Tuesday included Newark (103 degrees – tie) and New York’s LaGuardia (101 degrees – tie) and Kennedy (102 degrees) airports. Kennedy airport tied its new all-time record of 102 degrees on Wednesday.
- New York City’s Central Park tied its all-time warmest June low temperature of 81 degrees on Tuesday morning.
- Atlantic City, New Jersey: The marina site tied its record hottest June low of 79 degrees Monday, previously reached in 1952 and 2016.
- Mt. Pocono, Pennsylvania: Set a new June record high of 93 degrees Monday. It was their first 90-degree high in almost 12 years and their hottest day since July 18, 2012.
- Wallops Island, Virginia: Tied their June record hot low of 79 degrees Monday, previously also set in 1991.
- Wilmington, Delaware: Tied their June record hot low of 77 degrees Monday, previously also set in 1894, 1895, 1952 and 2014.
- Cheyenne, Wyoming: Set a new June record hot low of 67 degrees Saturday. That may not sound that hot, but Cheyenne is at 6,160 feet elevation, over 800 feet higher than Denver, and is in a semi-arid High Plains climate.
- Grand Rapids, Michigan: Set a new June record hot low of 80 degrees Sunday, topping their previous June record of 79 degrees on June 20, 1953.
- Holland, Michigan: Tied their June record ho low of 80 degrees Sunday, previously reached on June 15, 2022 and June 20, 1953.
- Mason City, Iowa: Set a new June record hot low of 77 degrees Saturday, edging out the previous record of 76 degrees from June 21, 1931.
- Waterloo, Iowa: Tied their June record hot low of 77 degrees Saturday, previously reached in June 1931, 1954 and 2024.
- La Crosse, Wisconsin: Tied their June record hot low of 80 degrees Sunday, previously reached on June 29, 1931. This equaled Sunday’s daily low in Phoenix, which is near their average for late June.
- Rockford, Illinois: Tied their June record hot low of 77 degrees Sunday, previously reached on June 14, 1981.
Other Heat Notables
- St. Francis, Kansas: Tied the nation’s hottest temperature Saturday (107 degrees) and lead the nation Sunday (104 degrees). In late June, Death Valley, California, usually is the nation’s hot spot, but in a “cooler” pattern, they only reached 105 on Saturday and 98 on Sunday.
- On Monday, Baltimore’s Inner Harbor soared to 104 degrees, just 2 degrees shy of the nation’s hottest temperature (106 at Death Valley). Their daily low Monday was only 85 degrees.
- Also on Monday, Burlington, Vermont, had its hottest day in almost 24 years, soaring to 99 degrees.
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