National Weather Service United States Department of Commerce

Isolated Severe Thunderstorms Across Southern U.S.; Heat Continues In West

Isolated severe thunderstorms are possible from the Southeast to Southern Plains today. Other thunderstorms may produce localized flash flooding across the Great Lakes, Midwest, and Mid Atlantic. Finally, the ongoing heat wave continues in the West and will expand into the Rockies by the weekend. Read More >

100° Day Summary for Waco        Click Here for DFW

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

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

 

First and Last Occurrences (1902-2019):
  • Average date of first 100°F: July 4
  • Average date of last 100°F: August 28
  • Earliest occurrence: Mar 28, 1971 (100°F)
  • Latest occurrence: Oct 4, 1983 (100°F)
  • Earliest last occurrence: Jul 8, 1931 (104°F)
  • Latest first occurrence: Oct 3, 1979 (101°F)
Most and Fewest:
  • Most in a calendar year: 90 (2011)
  • Fewest in a calendar year: 0 (1920, 1919)
  • Most consecutive: 44 (Jun 30 - Aug 12, 2011)
  • Most in a month: 31 (Jul 2011, Jul 1980)
  • Greatest number of months in a year with at least one occurrence: 5
    2011 - May, June, July, August, September
    1998 - May, June, July, August, September
    1985 - May, June, July, August, September
    1977 - June, July, August, September, October
    1963 - April, June, July, August, September
    1911 - May, June, July, August, September
  • Only month to record both 100°F and 32°F: Mar 1971 (29°F on the 3rd and 100°F on the 28th)