Temperatures of 100 degrees F occur in parts of western Minnesota every 1-3 years, but are much less common in the east and north. In the Twin Cities, the maximum temperature has reached at least 100 F on just 68 days since 1873, covering 33 different years. Thus, these ultra-hot days only occur once every 4-5 years on average in the Twin Cities, but years that do have them often have more than one. The most was in 1936, with nine days, thanks to a chart-topping heat wave during July.
The temperature reached 100 degrees on July 27, 2026, at the Twin Cities International Airport. The last time the Twin Cities reached 100 degrees or more was a 101 degrees F reading on June 20, 2022. This was the highest temperature recorded at the airport since July 6, 2012, when the mercury reached 102.
The last time high temperatures reached or exceeded 100 degrees F twice in the same week was in July of 2012, and the last year with three or more100-degree maximum temperatures in the Twin Cities was 1988, when there were four.
100-degree F days are most common during July, which is the center of Minnesota's hot season. In the Twin Cities, 70% of the 100-degree days occur during that month (47 out of 67 total). June contains 15% of the days (10), August 10% (seven days), May has had just two days and September only one. Most of these very hot days are rain-free, and only 15% of them (10 total) have had measurable precipitation; none have recorded even a half-inch.
Below is a table of all the dates since 1873 of days where the temperature was 100 F or higher at the official Twin Cities observing site.
Year Month Day Precip High Low Average 1883 7 1 0 100 72 86 1894 7 11 0 100 71 86 1894 7 26 0 100 75 88 1901 7 20 0 102 76 89 1901 7 23 0 101 74 88 1901 7 24 0 101 67 84 1913 8 15 0 100 74 87 1926 7 16 0 102 68 85 1931 6 28 0 102 82 92 1931 6 29 0 102 83 93 1931 6 30 0 100 82 91 1931 7 15 0 101 77 89 1931 7 16 0 100 80 90 1931 7 27 0 104 80 92 1931 9 10 0 104 75 90 1932 7 20 0.02 101 74 88 1933 6 19 0 100 75 88 1933 7 30 0 100 78 89 1934 5 31 0 106 75 91 1934 6 27 0 104 70 87 1934 7 21 0 105 73 89 1934 7 22 0 105 71 88 1934 7 23 0 105 80 93 1936 7 6 0 104 69 87 1936 7 7 0 101 80 91 1936 7 8 0 101 82 92 1936 7 10 0 106 80 93 1936 7 11 0 106 82 94 1936 7 12 0 106 83 95 1936 7 13 0 105 86 96 1936 7 14 0.04 108 72 90 1936 8 15 0.44 103 70 87 1937 7 10 0 100 76 88 1940 7 18 0 101 68 85 1940 7 19 0.02 100 76 88 1940 7 22 0 103 74 89 1940 7 23 0 103 75 89 1941 7 23 0 100 74 87 1941 7 24 0 104 76 90 1947 8 4 0 102 76 89 1947 8 5 0 100 78 89 1947 8 10 0 101 75 88 1947 8 17 0.28 100 72 86 1948 7 6 0 101 75 88 1949 7 3 0 100 79 90 1949 7 4 0 100 75 88 1955 7 26 0.08 100 73 87 1955 7 28 0 100 72 86 1956 6 13 0 100 77 89 1974 7 8 0 101 73 87 1976 7 13 0 100 69 85 1977 7 19 0 100 79 90 1980 7 11 0.3 100 72 86 1982 7 5 0 100 78 89 1985 6 8 0 102 64 83 1988 6 24 0 101 70 86 1988 7 15 0.06 102 79 91 1988 7 31 0 105 72 89 1988 8 1 0 101 74 88 1990 7 3 0 100 72 86 1995 7 13 0 101 75 88 2006 7 31 0.09 101 80 91 2011 6 7 0 103 78 91 2012 7 4 0 101 81 91 2012 7 6 0 102 78 84 2018 5 28 0.01 100 73 87 2022 6 20 0 101 79 90 2026 7 27 0 100 76 88