National Weather Service United States Department of Commerce

Excessive Heat in the Interior West; Monsoon Conditions in the Southwest

Dangerous heat is expected to be in place across portions of California, especially the Central Valley, and across the Interior Northwest into Friday. Heat Advisories will also be in place across the southern Plains into the Lower Mississippi River Valley. Monsoonal showers and thunderstorms may result in flash flooding and debris flows from the Four Corners region and Southwest through Friday. Read More >

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

Average Number of 100° Days (1991-2020):

DFW - 100-Degree Days (1991-2020)

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

 

First and Last Occurrences (1899-2021):
  • Average date of first 100°F: July 1
  • Average date of last 100°F: August 27
  • Earliest occurrence: Mar 9, 1911 (100°F)
  • Latest occurrence: Oct 3, 1951 (106°F)
  • Latest first occurrence: Aug 23, 1989 (101°F)
  • Earliest last occurrence: May 30, 1928 (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)