100 Degree Weather Facts for the DFW Area

It seems to have been a fairly mild spring/summer thus far, but before long it will be 100 degrees and rainfall will likely become a distant memory. You might recall that last summer was way below average as far as 100-degree days are concerned—we only had 7 days of at least 100 degrees (we average 20).

That begs the question:  How hot will it be this summer? While we all know that it is very difficult to predict the weather, I recently read the following statement from Jesse Hawila, senior meteorologist for WFAA:  All summers in North Texas are hot…but this one may be particularly hot. We average 20 triple-digit days in a summer. I do suspect we’ll have above-normal triple-digit days this year.” (Source: KERA article by Ron Corning on April 23, 2026)

For those of you weather nerds (like myself) who need more information on 100-degree days, thanks to the National Weather Service & weatherunderground.com, I have included it below.

• Average date of first 100°F: July 1
  • 2025—July 29^th
  • 2024—June 23^rd
  • 2023—June 25^th
  • 2022—June 11^th
  • 2021—July 25^th
  • 2020—July 12^th
  • 2019—July 30^th
  • 2018—June 22^nd
  • 2017—June 23^rd
  • 2016—July 22^nd
  • 2015—July 26^th
  • 2014—July 13^th
• Average date of last 100°F: August 26
  • 2025—Sept 4^th
  • 2024—August 23^rd
  • 2023—Sept. 24^th
  • 2022—Aug. 17^th
  • 2021—Sept. 20^th
  • 2020—Aug. 29^th
  • 2019—Sept. 7^th
  • 2018—Aug. 18^th
  • 2017—Aug. 19^th
  • 2016—Sept. 20^th
  • 2015—Sept. 7^th
  • 2014—Sept. 10^th
• Earliest occurrence: Mar 9, 1911 (100°F)
• Latest occurrence: Oct 3, 1951 (106°F)
• Average number of 100° days: 20
  • 2025—7 total 100-degree days
  • 2024—23 total 100-degree days
  • 2023—55 total 100-degree days
  • 2022—47 total 100-degree days
  • 2021—8 total 100-degree days
  • 2020—9 total 100-degree days
  • 2019—14 total 100-degree days
  • 2018—23 total 100-degree days
  • 2017—10 total 100-degree days
  • 2016—18 total 100-degree days
  • 2015—15 total 100-degree days
  • 2014—15 total 100-degree days
• Longest 100-degree streaks
  • 1980 – 42 days
  • 2011 – 40 days
  • 1998 – 29 days
  • 1952 – 25 days
  • 1999 – 24 days
• Most in a calendar year: 71 (2011)
• Fewest in a calendar year: 0 (1973 & 1906)
• Most consecutive: 42 (1980)
• Most in a month: 31 (July 1980)
• Average number of 100° days by month
  • May—0.1 day
  • June—1.6 days
  • July—7.4 days
  • August—9.7 days
  • September—1.4 days
• Highest temperature ever recorded: 113 degrees (1980)
  • 2025—104 degrees
  • 2024—106 degrees
  • 2023—110 degrees
  • 2022—109 degrees
  • 2021—102 degrees
  • 2020—106 degrees
  • 2019—102 degrees
  • 2018—109 degrees
  • 2017—102 degrees
  • 2016—107 degrees
  • 2015—106 degrees
  • 2014—104 degrees

In the record-breaking year of 2011 when we had 71 days of at least 100 degrees, we had our first 100-degree day on June 13th and our last one on September 29th—what a summer to remember! July was brutal that year with all but one day reaching 100 degrees. For those of you who were in DFW in 1980, every single day in July reached 100 degrees.

Hopefully this summer will be nothing like 2011 or 1980!

We hope that you enjoy your pool this summer.

National Weather Service: DFW 100-degree day records