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.

10-year temperature averages for Aspen, 2010 to 2019
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
30-year temperature averages for Aspen, 1991 to 2020
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).

Days per month in Aspen of at least 60, 70 or 80 °F
  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.

Days per month on average in Aspen when the minimum temperature drops to 32, 20, or 10 °F or below
  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.

Colorado Temperatures
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