Aspen, nestled in the heart of Colorado’s Rocky Mountains, features a high alpine climate with cold, snowy winters and warm, dry summers. The area is famous for its dramatic seasonal contrasts, abundant sunshine, and significant day-night temperature swings, making it a premier destination for both world-class skiing and vibrant summer outdoor activities.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Aspen’s climate is classified as humid continental (Dfb), shaped by its high elevation of 2,400 metres (7,908 feet). Winters (November–April) are long, cold, and snowy, with average highs around 0°C and lows near –13°C in January, the coldest month. Snowfall is abundant, averaging 170–300 inches (430–760 cm) per year, and ski season typically runs from late November to April. Despite the cold, the winter sun is strong, and clear blue skies are common, though storms can bring heavy snow and occasional travel disruptions.
Summers (June–September) are comfortably warm and dry, with average highs of 22–24°C in July and cool nights dropping to 7–10°C. Afternoon thunderstorms are possible, but rain is generally brief, and humidity remains low. The diurnal temperature range is large, so evenings can feel chilly even after hot days. Spring and autumn are transitional, with rapidly changing weather – spring can bring late snow, while fall is known for crisp air and vibrant foliage. Aspen enjoys nearly 300 sunny days per year, with daylight stretching up to 15 hours in midsummer and dropping to 9 hours in winter. Winds are generally light to moderate, but mountain breezes can feel brisk, especially in exposed areas.
The region’s climate supports a long ski season, lush summer meadows, and a wealth of outdoor recreation opportunities. Visitors should always pack layers and sun protection, as weather conditions can shift quickly at high altitude.
| Average climate data for Aspen, United States | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | -4 | -4 | -0 | 3 | 10 | 18 | 21 | 20 | 16 | 8 | 2 | -4 | 21 |
| Average minimum temperature (°C) | -17 | -15 | -12 | -9 | -4 | 2 | 5 | 4 | 1 | -4 | -10 | -16 | -17 |
| Average precipitation (mm) | 7 | 9 | 13 | 9 | 11 | 11 | 13 | 11 | 5 | 8 | 6 | 7 | 110 |
| Average rainfall days (days) | 3 | 4 | 6 | 7 | 7 | 6 | 12 | 9 | 5 | 5 | 3 | 5 | 72 |
| Average snowfall (mm) | 55 | 74 | 100 | 51 | 45 | 18 | 0 | 0 | 2 | 46 | 45 | 60 | 495 |
| Average snowfall days (days) | 10 | 13 | 13 | 11 | 8 | 2 | 0 | 0 | 1 | 5 | 8 | 12 | 84 |
| Average relative humidity (%) | 88 | 89 | 86 | 81 | 68 | 50 | 61 | 59 | 58 | 64 | 75 | 85 | 72 |
| Average wind speed (km/h) | 7 | 9 | 9 | 9 | 9 | 10 | 8 | 7 | 8 | 8 | 8 | 7 | 8 |
| Average daily daylight hours (h) | 9 | 10 | 12 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 9 | 12 |
| Average daily sunshine hours (h) | 5 | 5 | 7 | 9 | 10 | 11 | 11 | 11 | 10 | 7 | 6 | 5 | 8 |
| Average cloud coverage (%) | 48 | 53 | 44 | 39 | 29 | 14 | 23 | 19 | 18 | 23 | 28 | 46 | 32 |
| Average UV index | 2 | 1 | 2 | 2 | 3 | 4 | 4 | 4 | 3 | 2 | 2 | 1 | 2 |
The best time to visit Aspen depends on your interests: December to March is ideal for winter sports, with deep snow and lively ski resorts. For hiking, biking, and festivals, July and August offer warm days, cool nights, and abundant sunshine, with wildflowers and mountain scenery at their peak.
The least favourable time to visit Aspen is in late mud season (late April to early June), when snow is melting, trails can be muddy, and some attractions may have limited hours. Early spring and late autumn can also bring unpredictable weather and fewer activities.
Aspen has a high alpine climate with cold, snowy winters and warm, dry summers. Winters average around 0°C by day and –13°C at night, while summers reach 22–24°C by day and cool off to 7–10°C at night.
The best time for skiing in Aspen is from December to March, when snow cover is deepest and the ski resorts are in full swing. The ski season typically runs from late November to April.
Summer highs in Aspen reach 22–24°C in July, with cool nights around 7–10°C. Afternoon thunderstorms are possible, but humidity is low and most days are sunny and comfortable for outdoor activities.
Yes, Aspen receives 170–300 inches (430–760 cm) of snow annually, with the heaviest snowfall from December to March. Snow can fall from mid-October to early May, supporting a long ski season.
Aspen enjoys nearly 300 days of sunshine per year. Even in winter, the sun is strong due to the high altitude, so sunglasses and sun cream are recommended year-round.
Pack layers for large day-night temperature swings, sun protection for high UV, and waterproof boots for winter or spring. Even in summer, bring a jumper or jacket for cool evenings and occasional rain.
Spring and autumn are quieter, with fewer crowds and beautiful scenery, but weather can be unpredictable. Some trails may be muddy in spring, and some attractions may have reduced hours between the main seasons.
The warmest month, with the highest average maximum temperature, is July (20.7 °C). The month with the lowest average maximum temperature is January (-4.3 °C). Overall, the average maximum temperature over the whole year is 7.1 °C.
The month with the highest average minimum temperature is July (4.7 °C). The coldest month, with the lowest average minimum temperature, is January (-16.6 °C). Overall, the average minimum temperature over the whole year is -6.2 °C.
The wettest month, with the highest amount of precipitation, is March (13.2 mm). The driest month, with the least amount of precipitation, is September (5 mm). Over the whole year there are 110.2 mm of rainfall on average.
The month with the most days of rain is July (12.2 days). The month with the fewest days of rain is November (2.8 days). Over the whole year there are 71.9 days of rain on average.
The month with the most snowfall is March (100.5 mm). The months with the least snowfall are July and August (0 mm). Over the whole year there are 495.4 mm of snowfall on average.
The month with the most days of snowfall is March (12.8 days). The month with the fewest days of snowfall is August (0.1 days). Over the whole year there are 83.7 days of snowfall on average.
The month with the highest average relative humidity is February (89.4 %). The month with the lowest average relative humidity is June (50.2 %). The overall average relative humidity over the whole year is 72.1 %.
The windiest month, with the highest average wind speed, is June (10.1 km/h). The calmest month, with the lowest average wind speed, is August (7.3 km/h). The overall average wind speed over the whole year is 8.2 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is February (53.2 %). The month with the clearest skies, so the lowest cloud coverage, is June (14.4 %). Over the whole year there is an average cloud coverage of 31.9 %.
The month with the longest days, so the most daylight, is June (Average daylight: 14.1 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9 h). Over the whole year there are 11.8 h of daylight per day on average.
The month with the most sunshine per day is August (Average sunshine: 11.1 h). The month with the least sunshine per day is February (Average sunshine: 5 h). Over the whole year there are 8.1 h of sunlight per day on average.
The months with the highest average UV index are June, July and August (UV index: 4). The months with the lowest average UV index are February and December (UV index: 1). Over the whole year the average UV index is 2.5.
