When Was the Last July with Zero 100-Degree Days in Dallas?

Dallas Heat Trends and July Temperatures

• 🌡️ Dangerous heat continues across North Texas, with a possibility of hitting 100 degrees this week.
• 📊 July has been cooler than normal so far, with 17 days below normal, 5 above, and 6 at normal temperatures.
• 📈 The normal temperature for this time of year is 97 degrees.

Historical 100-Degree Day Data

• 🗓️ The last time Dallas (DFW) experienced a July with no 100-degree days was in 2007.
• 🔍 Official records for DFW, kept since the late 1800s, show 22 years with no 100-degree days through July 29th.
• ⚠️ A delay in reaching triple-digit temperatures this late in the season often correlates with a significant decrease in the total number of 100-degree days for the year.

Recent Years with Delayed Triple-Digit Heat

• 2019: No 100-degree days until July 30th, followed by 14 triple-digit days that year.
• 2007: The entire month of July had no 100-degree days, with only 7 for the entire year.
• 1997: No triple-digit heat day by this point, ending the year with only 2.
• 1992: Similar delay, resulting in only 1 triple-digit day for the year.
• 1989: Ended the year with a total of 6 triple-digit days.

Normal vs. Actual 100-Degree Days

• 🎯 The normal number of 100-degree days for any given year in DFW is 20.
• 📉 Historically, years that have delayed triple-digit heat beyond this point tend to have fewer than the normal number of 100-degree days overall.