Summary of September Heat

Summary of September 2007’s Heat
With cooler, more seasonable temperatures expected to return to Central Indiana, and the threat of 90 degree temperatures greatly diminished, its time to take a quick look back at the unusual heat of this September. The following information pertains to data collected from Indianapolis International Airport.
September 2007, Days in the 90s:
High Temperature
September 3
September 4
September 5
September 23
90 (Tied Record – 1961)
September 24
92 (Broke Record - 1891)
Facts on September’s Heat:
  • A normal September could expect to see 2 days of 90 degrees or hotter. The years with the most days of 90 or hotter in September were 1891 and 1897, which both had 12 days exceed the mark. This is the first year since 2002 that it has hit 90 in September.
  • 92 degrees on September 24, 2007 was third hottest temperature ever during the last week of September.
  • The latest date on record for 90 degrees in Indianapolis was October 4, 1954. It has only reached 90 degrees in October twice during the past 135 years.


  • It was just back on September 15th that Indianapolis was 1 degree off the all-time record low for the date, with a morning reading of 43 degrees. The month as a whole is currently above normal by 4.8 degrees for the first 24 days.
  • This makes 35 days this year of 90 or higher. The normal is 18 days, and the most ever is 58 in 1983.
  • September 2007 had 5 days of 90 or hotter, compared to only 3 during July this year. This has only happened 5 times in the last 67 years.


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