Aspen Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Aspen, Colorado during each month of the year.
The average high and low temperatures are listed below monthly and annually for the mountain city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 60, 70 or 80 °F each month in Aspen, scroll down farther. There are also monthly and yearly counts of days with cold weather.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 34 | 8 | January | 1 | -13 |
| 37 | 12 | February | 3 | -11 |
| 47 | 21 | March | 8 | -6 |
| 53 | 27 | April | 12 | -3 |
| 62 | 34 | May | 17 | 1 |
| 78 | 43 | June | 25 | 6 |
| 81 | 49 | July | 27 | 9 |
| 78 | 47 | August | 26 | 8 |
| 73 | 41 | September | 23 | 5 |
| 58 | 29 | October | 15 | -2 |
| 46 | 19 | November | 8 | -7 |
| 34 | 10 | December | 1 | -12 |
| 57 | 28 | Year | 14 | -2 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 32 | 10 | January | 0 | -12 |
| 35 | 13 | February | 2 | -11 |
| 43 | 20 | March | 6 | -7 |
| 50 | 27 | April | 10 | -3 |
| 60 | 35 | May | 16 | 2 |
| 71 | 42 | June | 21 | 6 |
| 76 | 48 | July | 24 | 9 |
| 73 | 47 | August | 23 | 8 |
| 67 | 40 | September | 19 | 4 |
| 55 | 30 | October | 13 | -1 |
| 42 | 19 | November | 5 | -7 |
| 32 | 10 | December | 0 | -12 |
| 53 | 28 | Year | 12 | -2 |
Days of Hot Weather in Aspen
The highest temperatures at Aspen are normally in the 80s Fahrenheit. The mountain city normally doesn't reach 90 °F (32 °C).
| 60 °F 16 °C |
70 °F 21 °C |
80 °F 27 °C | |
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 0 | 0 | 0 |
| March | 2 | 0 | 0 |
| April | 8 | 1 | 0 |
| May | 21 | 8 | 0 |
| June | 29 | 22 | 5 |
| July | 31 | 29 | 14 |
| August | 31 | 27 | 8 |
| September | 27 | 18 | 2 |
| October | 16 | 4 | 0 |
| November | 3 | 0 | 0 |
| December | 0 | 0 | 0 |
| Year | 166 | 108 | 28 |
How Often Aspen Has Cold Temperatures
Most nights at Aspen have freezing temperatures. Even July and August average one night every ten years that's 32 °F (0 °C) or colder. Typically on 14 nights a winter, the thermometer drops to 0 °F (-18 °C) or below.
The city averages 40 days a year that never warm up to above freezing, including about one-third of winter days. A frosty day can appear any time from October to April.
| 10 °F -12 °C |
20 °F -8 °C |
32 °F 0 °C | |
|---|---|---|---|
| January | 16 | 28 | 31 |
| February | 12 | 22 | 28 |
| March | 4 | 15 | 30 |
| April | 1 | 6 | 25 |
| May | 0 | 1 | 11 |
| June | 0 | 0 | 2 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 4 |
| October | 1 | 4 | 19 |
| November | 5 | 15 | 29 |
| December | 16 | 27 | 31 |
| Year | 54 | 117 | 210 |
References
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.
NOAA National Centers for Environmental Information (NCEI). Climate Normals.