Frost dates · Colorado
When is the first frost in Denver?
Denver right now
40°FOvercast skies
- Today49°F / 42°FClouds
- Tomorrow60°F / 36°FClear skies
- Monday62°F / 35°FClouds
The sky's forgotten its color.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical year, Denver’s first frost comes around October 9 and its last around May 5.
One year in ten the first frost comes as early as September 27, and nine years in ten it has arrived by October 20. One year in ten the last frost is over as early as April 23, and nine years in ten it is over by May 19. Denver averages about 156 nights a year at 32°F or colder, with about 156 frost-free days in between in a typical year. It’s frost season here, and the last frost usually comes around May 5. That makes it the 18th earliest first frost of the 117 cities we track where it freezes most years.
Last updated
No freeze in the forecast for the next 48 hours.
Denver’s last frost hangs on into May, because the Front Range likes a dramatic exit.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | September 27 | October 9 | October 20 |
| Last frost | April 23 | May 5 | May 19 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Green Bay, Wisconsin: first frost around October 9
- Madison, Wisconsin: first frost around October 10
- Waterloo, Iowa: first frost around October 10
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00003017.