Climate and monthly weather forecastAspen, CO
Climate and monthly weather forecast
The climate of Aspen
Aspen, a popular town located in Colorado, USA, descends under the Köppen climate classification Dfc indicating a Subarctic climate zone. This climate is characterized by severe winters, a non-existent dry season and cool summers. On average, temperatures fluctuate significantly from 2.1°F (-16.6°C) recorded as the lowest in winter to a high of 69.4°F (20.8°C) in summer months.Annual rainfall averages from 0.2" (5mm) to 0.51" (13mm), with July usually being the wettest month. The town sees snowfall too, varying anywhere between 0" (0mm) in the warmer months to nearly 4" (102mm) in the colder months of winter. Aspen experiences distinct seasonal changes, with relative humidity changing from 51% during the driest month to 90% during the wettest period. Average daylight hours range from 9.5 hours in December to a high of 14.9 hours in June, while the sunshine is plenty in the town, the year-round average ranging from 5.2 hours in the least sunny to 11.8 hours in the most sunny months.
It is worth noting that Aspen's climate also manifests in rather interesting ways. The highest wind speeds are typically seen in June with 7.1mph (11.4km/h), and the highest gust speeds of 9.1mph (14.6km/h) are also noticed in the same month.
The best time to visit Aspen
Summer, starting from June up to August, emerges as the ideal time to plan a visit to Aspen. During these months, the weather settles around a comfortable high of around 69.4°F (20.8°C), and drops to a cool 40.5°F (4.7°C) at night, making it a perfect time for outdoor activities. In addition, it is relatively drier with the lowest relative humidity of 51% in June.Brace yourselves for the longest daylight hours from 14.3 hours in May to 14.9 hours in June. This means that there are more sunlit hours to explore the town. June is also the month boasting the highest wind speeds, offering a refreshing respite from the summer warmth.
The worst time to visit Aspen
Contrastingly, the coldest months from December to February might not be the best time to visit Aspen unless one enjoys severely cold weather. During this period, temperatures drop significantly to as low as 2.1°F (-16.6°C) and do not exceed 32°F (0°C). Despite the cold, these months record the maximum snowfall ranging from 2.32" (59mm) and 2.13" (54mm) in December and January respectively. It is also worth noting that daylight hours during these months are the shortest ranging from 9.5 hours in December to 10.8 hours in February.Spring weather in Aspen
Spring in Aspen is characterized by slowly rising temperatures ranging from highs of 32°F (0°C) to reach 49.6°F (9.8°C) by the end of the season. Lows during this season range from 11.1°F (-11.6°C) to 24.8°F (-4°C). Although a wet season, rain remains relatively low with an average of 0.35" (9mm) and reaches up to 0.43" (11mm) by May. Snow continues to fall during early spring with 3.98" (101mm) in March and reduces to 1.97" (50mm) by April.Summer weather in Aspen
Summer in Aspen is marked by pleasant weather with temperatures swinging between highs of 64.9°F (18.3°C) to 69.4°F (20.8°C) and lows of 35.4°F (1.9°C) to 40.5°F (4.7°C). This is also the drier part of the year with rainfall averages of 0.43" (11mm) from June to August. Snowfall is almost non-existent in summer. Sunshine is abundant with 11.8 hours of it in June, providing ample daylight for sightseeing.Autumn Weather in Aspen
Autumn in Aspen is marked by a distinct drop in temperatures, with highs falling from 61°F (16.1°C) in September to 34.5°F (1.4°C) in November. Autumn nights can get quite chilly, with temperatures dropping to 34.5°F (1.4°C) in September and reaching as low as 13.3°F (-10.4°C) by November. Rainfall experiences a slight increase in September with 0.31" (8mm) before it falls to 0.24" (6mm) in November.Winter weather in Aspen
Winter weather in Aspen is severe and harsh, with temperatures as low as 2.1°F (-16.6°C) in January. The highest temperature in winter does not exceed a frigid 32°F (0°C). Snowfall increases rapidly during this season from 1.81" (46mm) in October to its peak of 2.32" (59mm) in December. Winter days are short with daylight hours hedging between 9.5 and 10.8 hours. The season, however, is adored by winter sports enthusiasts for its snow-clad landscapes and ideal conditions for skiing and snowboarding.Weather in January
January marks the onset of a frosty and white winter in Aspen, Colorado. It is colder than December with average low temperatures plunging to 2.1°F (-16.6°C) and daylight hours lasting a mere 9.8 hours. Snowfall is frequent, bolstering Aspen's reputation as a winter wonderland with 2.13" (54mm) of snow falling over 10.4 days. Weather in January »Weather in February
February is another frigid month in Aspen with a slight temperature rise compared to January. Its weather conditions are conducive to snow sports, making it ideal for ski adventures. Accumulating 2.91" (74mm), snowfall continues to blanket Aspen during February. Weather in February »Weather in March
Winter persists into March, though Aspen experiences a considerable rise in temperature when compared to February. The city witnesses relatively more rainfall, accounting for over half an inch on average. With more sunshine hours and less snowfall, the conditions become a welcoming change for inhabitants and visitors. Weather in March »Weather in April
April registers further improvement in weather, harbinger of the approaching spring in Aspen. Daylight hours increase significantly offering inhabitants more time to relish in outdoor activities. The city records an increase in both the lowest and highest average temperatures. Weather in April »Weather in May
May is a transitional month from chilly spring towards the dawning summer in Aspen. Days further elongate enabling residents to soak in warmth, vibrant colors and the fresher atmosphere. With the average high temperature reaching 49.6°F (9.8°C), outdoor activities are favorable. Weather in May »Weather in June
June, marking the onset of summer, brings a surge in temperature and daylight hours in Aspen. The pleasant weather and extended daylight hours are well-suited for outdoor recreation. It's the driest period of the year with the relative humidity dropping to 51%. Weather in June »Weather in July
July is the warmest month with an average high temperature of a balmy 69.4°F (20.8°C). Clothing lightens further as Aspen basks in the height of summer. Despite the warmth, there is considerable rainfall totaling to 0.51" (13mm). The city averages 14.6 hours of daylight, which are bright and sunny for a majority of the day. Weather in July »Weather in August
August maintains the sizzling temperatures from July in Aspen, becoming a prime summer month. The average high temperature sustains at 67.3°F (19.6°C), resulting in balmy days and mild nights. Cloud cover is slightly lesser than July leading to brighter days with abundant hour of sunshine. Weather in August »Weather in September
September brings the beginning of autumn to Aspen along with a decline in temperature. The fading summer heat and longer nights bid farewell to the balmy summer and welcome the fresh autumn. The city receives an average of 0.2" (5mm) of rainfall over 5.5 days. Weather in September »Weather in October
October ushers in a colder autumn with a noticeable drop in temperature in Aspen. As the color of leaves turn, Aspen's outstanding beauty demands visitor appreciation. Slight increases in cloud cover result in a dramatic drop in visibility. Weather in October »Weather in November
By November, winter is setting its foot in Aspen, marking shorter days and snow showers. Transitioning into the frosty season, the average high temperature tumbles to 34.5°F (1.4°C). The first significant snowfalls of winter are observed during November, paving the way for the full-blown winter to follow. Weather in November »Weather in December
In December, Aspen is fully engrossed in winter with shorter days and colder temperatures. Ski season is in full swing as 2.32" (59mm) of snow dresses the landscape in a blanket of pure white. It's the heart of winter, with the city's maximum temperature barely exceeding the freezing point. Weather in December »Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The lowest level of Aspen's temperatures is noted during January and December, averaging a high-temperature of 24.4°F (-4.2°C).
In Aspen, during the entire year, the rain falls for 72.4 days and collects up to 4.33" (110mm) of precipitation.
January through June, September through December are months with snowfall.
In Aspen, Colorado, during the entire year, snow falls for 83.2 days and aggregates up to 19.45" (494mm) of snow.
With an average relative humidity of 90%, February is the most humid month in Aspen.
February has the least sunshine of the year in Aspen, with an average of 5.2h of sunshine.
The months with the lowest UV index in Aspen, Colorado, are February and December, with an average maximum UV index of 1.
The months with the most rainfall in Aspen are March and July, with an average 0.51" (13mm) of precipitation.
March is the month with the most snowfall in Aspen. Snow falls for 12.7 days and accumulates 3.98" (101mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
The least humid month is June, with an average relative humidity of 51%.
June has the longest days of the year in Aspen, Colorado, with an average of 14h and 54min of daylight.
With an average of 11.8h of sunshine, June has the most sunshine of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 4.
Aspen's warmest month, July, registers temperatures that range from a high of 69.4°F (20.8°C) to a low of 40.5°F (4.7°C).
July and August are months without snowfall.
September is the month with the least rainfall in Aspen, Colorado. Rain falls for 5.5 days and accumulates 0.2" (5mm) of precipitation.
With an average of 9h and 30min of daylight, December has the shortest days of the year in Aspen, Colorado.
Average temperature
Aspen, CO
The warmest month (with the highest average high temperature) is July (69.4°F).
The months with the lowest average high temperature are January and December (24.4°F).
The month with the highest average low temperature is July (40.5°F).
The coldest month (with the lowest average low temperature) is January (2.1°F).
Average pressure
Aspen, CO
- Average pressure in January:
30.23"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
30.06"Hg - Average pressure in August:
30.07"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.07"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.17"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are April and May (29.95"Hg).
Average wind speed
Aspen, CO
- Average wind speed in January:
4.5mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.4mph - Average wind speed in April:
5.5mph - Average wind speed in May:
5.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.5mph - Average wind speed in September:
4.8mph - Average wind speed in October:
5mph - Average wind speed in November:
4.7mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest months (with the lowest average wind speed) are January and August (4.5mph).
Average humidity
Aspen, CO
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is June (51%).
Average rainfall
Aspen, CO
- Average rainfall in January:
0.28" - Average rainfall in February:
0.35" - Average rainfall in March:
0.51" - Average rainfall in April:
0.35" - Average rainfall in May:
0.43" - Average rainfall in June:
0.43"
- Average rainfall in July:
0.51" - Average rainfall in August:
0.43" - Average rainfall in September:
0.2" - Average rainfall in October:
0.31" - Average rainfall in November:
0.24" - Average rainfall in December:
0.28"
The wettest months (with the highest rainfall) are March and July (0.51").
The driest month (with the least rainfall) is September (0.2").
Average rainfall days
Aspen, CO
- Average rainfall days in January:
2.8 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
5.8 days - Average rainfall days in April:
7.3 days - Average rainfall days in May:
7.1 days - Average rainfall days in June:
5.5 days
- Average rainfall days in July:
12.1 days - Average rainfall days in August:
9.3 days - Average rainfall days in September:
5.5 days - Average rainfall days in October:
5.3 days - Average rainfall days in November:
2.9 days - Average rainfall days in December:
5.2 days
The month with the highest number of rainy days is July (12.1 days).
The month with the least rainy days is January (2.8 days).
Average snowfall
Aspen, CO
- Average snowfall in January:
2.13" - Average snowfall in February:
2.91" - Average snowfall in March:
3.98" - Average snowfall in April:
1.97" - Average snowfall in May:
1.77" - Average snowfall in June:
0.71"
The month with the highest snowfall is March (3.98").
The months with the least snowfall are July and August (0").
Average snowfall days
Aspen, CO
- Average snowfall days in January:
10.4 days - Average snowfall days in February:
12.8 days - Average snowfall days in March:
12.7 days - Average snowfall days in April:
11 days - Average snowfall days in May:
8 days - Average snowfall days in June:
1.9 days
- Average snowfall days in July:
0.1 days - Average snowfall days in August:
0.1 days - Average snowfall days in September:
1.1 days - Average snowfall days in October:
5.3 days - Average snowfall days in November:
8 days - Average snowfall days in December:
11.8 days
The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are July and August (0.1 days).
Average daylight / Average sunshine
Aspen, CO
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 30min - Average sunshine in February:
5h and 12min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 36min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
11h and 24min - Average sunshine in August:
11h and 30min - Average sunshine in September:
10h and 54min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 36min - Average sunshine in December:
5h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days
Aspen, CO
- Average sunshine days in January:
23.5 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
16.6 days - Average sunshine days in May:
15.5 days - Average sunshine days in June:
17.1 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
22.9 days - Average sunshine days in November:
23.6 days - Average sunshine days in December:
20.9 days
The month with the most sunshine days is November (23.6 days).
The month with the least sunshine days is July (9.8 days).
Average UV index
Aspen, CO
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Aspen, CO
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 15).
Average visibility
Aspen, CO
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
