We get it.
You’re hot. We’re hot. Everyone in Colorado is hot right now.
This week is going to be sweltering across the state — Grand Junction is under an excessive heat warning, with high temperatures forecast to reach 107 on Tuesday and Wednesday — so we thought we’d pile on by looking at five hot Denver weather facts from the National Weather Service in Boulder.
Warning: This will not cool you down.
Denver’s hottest day(s)
The mercury has reached 105 degrees Fahrenheit in Denver five times since 1878. Here are the dates:
- Aug. 8, 1878
- July 20, 2005
- June 25, 2012
- June 26, 2012
- June 27, 2018
The most 90-degree days
The record for the summer season (April through October) with the most 90-degree days was set just last year, in 2020. There were 75 days at 90 degrees or hotter. Last year also saw devastating wildfires across Colorado, including the three largest wildfires in state history.
In the 11 years since 2010, six of those years have had 50 or more days of 90-plus degree heat in Denver.
The most consecutive 90-degree days
There were two years with 24 consecutive 90-degree days in Denver.
The record was reached between July 11, 2012, and Aug. 3, 2012, and July 13, 2008, and Aug. 5, 2008.
Denver’s 10 warmest summers
Here were Denver’s warmest summers by average temperature:
| Rank | Year | Average temperature |
| 1 | 2012 | 76.3 |
| 2 | 2020 | 74.9 |
| 3 | 1994 | 74.1 |
| – | 1934 | 74.1 |
| 5 | 1936 | 74.0 |
| 6 | 2006 | 73.9 |
| 7 | 1980 | 73.8 |
| 8 | 2011 | 73.7 |
| – | 1881 | 73.7 |
| 10 | 2007 | 73.5 |
Denver’s average June temperature
The average June temperature in Denver is 67.4 degrees. Remember, that includes daily low temperatures, too.
Bonus: The chilliest June day
The lowest temperature recorded in Denver in June? Thirty degrees. That happened on June 2, 1951.
Let’s just channel that chilliness this week.
CORRECTION: This story was updated at 8:45 p.m. on June 14, 2021, to correct the year in which the record for most 90-degree days in Denver was set.