National Weather Service United States Department of Commerce

Widespread Excessive Heat and Humidity in Midwest to Spread to East Coast

High pressure building across the Central and Eastern U.S. will produce a dangerous combination of heat and humidity. Heat indices from unusually high dewpoints and well above normal temperatures may reach 110 to 115 degrees. In addition, near record warm low temperatures will limit recovery from hot daytime temperatures. Read More >

100° Day Summary for Dallas/Fort Worth        Click Here for Waco

Average Number of 100° Days (1981-2010):

DFW - 100-Degree Days (1981-2010)

(March, April, and October have had 100° days,
but the average is near zero.)

 

First and Last Occurrences (1899-2018):
  • Average date of first 100°F: July 1
  • Average date of last 100°F: August 26
  • Earliest occurrence: Mar 9, 1911 (100°F)
  • Latest occurrence: Oct 3, 1951 (106°F)
  • Earliest last occurrence: May 30, 1928 (101°F)
  • Latest first occurrence: Aug 23, 1989 (101°F)
Most and Fewest:
  • Most in a calendar year: 71 (2011)
  • Fewest in a calendar year: 0 (1973, 1906)
  • Most consecutive: 42 (Jun 23 - Aug 3, 1980)
  • Most in a month: 31 (Jul 1980)
  • Greatest number of months in a year with at least one occurrence: 5
    2006 - April, June, July, August, September
    1998 - May, June, July, August, September
    1925 - April, June, July, August, September
    1911 - March, May, June, July, August
  • Only month to record both 100°F and 32°F: Mar 1916 (25°F on the 3rd and 100°F on the 21st)