Aspen weather
Ten-year climate averages, month by month
Aspen in september
Current month averages, based on ten years of records. Read the full guide →
Aspen is a resort city in Pitkin County, Colorado, at the base of the Elk Mountains. World-famous for its four ski areas — Aspen, Highlands, Snowmass and Buttermilk — and dazzling autumn aspen groves.
The year in weather
Aspen weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for Aspen.
Places that feel like Aspen in september
Aspen weather — FAQ
Q01Which months are best for visiting Aspen?
Which months are best for visiting Aspen?
The best months to visit Aspen are June, July, August, September. Mid-July after Independence Pass fully clears of snow, unlocking the Continental Divide loop to Leadville before August monsoons hit.
Q02Which month is warmest in Aspen?
Which month is warmest in Aspen?
July runs the highest averages in Aspen, with typical daytime highs of 26°C (79°F). Even July nights drop below 10C; the Music Festival tent on Castle Creek fills, and locals swim Grottos slabs on the Roaring Fork.
Q03Which month is chilliest in Aspen?
Which month is chilliest in Aspen?
January brings the lowest averages, with daytime highs near 1°C (33°F). January delivers champagne powder but negative windchill on Highland Bowl; Silver Queen gondola line at 8:30am is your only shot at fresh tracks.
Q04When is the rainy season in Aspen?
When is the rainy season in Aspen?
March typically records the highest monthly rainfall — around 72mm on average. Late July afternoon thunderstorms are clockwork by 2pm; hikers on Cathedral Lake trail turn back at noon or get lightning-stranded above treeline.
Q05How would you describe Aspen's weather?
How would you describe Aspen's weather?
Aspen, United States has mild summers, cold winters. Aspen locals live down-valley in Basalt or Carbondale because Aspen proper is second-home country. The RFTA bus is free and beats parking hell. Woody Creek Tavern still slings green chile Hunter Thompson-style. Mud season (April and November) shuts most restaurants, so calling ahead matters more than reservations. The Maroon Bells shuttle from Aspen Highlands is mandatory 8am-5pm in summer. You can read the detailed month-by-month breakdown on this page.
