Quantcast
Weather Highlights of the 1960s
Weathermen as Portrayed in Movies & TV Shows

Years With No Heat Waves

Heatwave

 

The official definition of a heat wave, established by the National Weather Service, is three or more days in a row with a high of 90° or hotter.  On average, a year has two hot spells like this, and the average heat wave lasts for four days.  The last year without one was in 2014.  Since records began in 1870 there have been 22 years without any, or about once every six or seven years.  (The most in one year was six, in 2010 and 1995).  Some other quick facts:

 

  • The longest gap between years with no heat waves is 28, between 1951 and 1979.  The only back-to-back years with no heat waves was in 1874 and 1875.  And there were one-year gaps in 1996-1998, 1902-1904, 1886-1884 and 1875-1877.
  • 1979 had the most 90-degree days without having a heat wave, 19.  (Average number of days in the 90s per year is 17).   Typically, a year with no heat waves averages seven 90-degree days.  
  • In the years with no heat waves the hottest reading was 97° in 1942.

 

Years With No Heat Waves

 

 

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

William

what year(s) had the least number of 90° days with a heat wave?

Rob

In 1960 there was a three-day heat wave among the year's five days in the 90s. And there have been five other summers with six days in the 90s and one heat wave: 1958, 1950, 1917, 1903 and 1888 (1917's heat wave of four days had highs that were all 98 or hotter).

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been saved. Comments are moderated and will not appear until approved by the author. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Comments are moderated, and will not appear until the author has approved them.

Your Information

(Name and email address are required. Email address will not be displayed with the comment.)