DFW - 100° Day Summary

Hot Weather in the West; Heavy Rainfall and Flooding in the Southwest

Hot to extremely hot temperatures are in place much of this week across parts of California and the interior Northwest U.S, with the Pacific Northwest carrying the potential for record-breaking high temperatures. Monsoonal moisture over the Southwest U.S. may lead to heavy rainfall and instances of flash flooding through Wednesday. 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 (1899-2024):

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)

Hot Weather in the West; Heavy Rainfall and Flooding in the Southwest

DFW - 100° Day Summary

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

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

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