Weather in Aspen in September
Aspen, United States averages a high of 20°C (68°F) and low of 5.1°C (41.2°F) in September, with 9 rain days and 11.5 hours of daily sunshine. Travel score: 77.9/100 (Good). The best time to visit Aspen is July.
High
20°C68°F
Low
5°C41°F
🌧️
9
rain days
☀️
11.5
hrs/day sunshine
💧
58%
humidity
78— Good
September in Aspen is mild and occasionally wet — good for most activities.
What are the average temperatures in Aspen?
How much does it rain in Aspen in September?
Aspen receives an average of 47.6mm of rainfall across 9 rainy days in September. The annual total is 657.8mm.
What should I pack for Aspen in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 20°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31