100-degree days are not common; 2012 was a rare hot one

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

DENVER — 100s are a bit unusual for Denver.

I received a follow-up question regarding Thursday’s 90-degree article asking for the history  of 100-degree weather.

Denver averages two 100-degree days each year – DIA is the official weather reporting station for the city.

DIA came online in mid-1994. In its 20 full summers of data, DIA has obviously had years without a single 100-degree day (1995, 1996, 1997, 1999, 2004, 2009, 2011, and 2015) but has had as many as 13 100-degree days (2012).

DIA days of 100s


Here’s the list of top 5 occurrences of consecutive 100-degree days; note that 2012 appears 3 times…it was a hot one that year:

  1.  5 days in 2012
  2.  5 days in 2005
  3.  3 days in 2012
  4.  2 days in 2012
  5.  2 days in 2008

For those that want some data comparison within the city, Stapleton was the official site for Denver for a long stretch before DIA. I’ve pulled that location’s data and since 1948, Stapleton averages less than one 100-degree day per year.

Stapleton days of 100s

Like DIA, the longest streak of consecutive 100s was in 2012:

  1. 5 days in 2012
  2. 5 days in 2005
  3. 5 days in 1989
  4. 4 days in 1990
  5. 2 days in 2008

So, although we do have 100-degree days in the Denver area, there aren’t very many. And, if we can string more than 2 days in a row of 100-degree heat that’s even more of a rarity.