Weather in Denver in September
Denver, United States averages a high of 25.2°C (77.4°F) and low of 10°C (50°F) in September, with 5 rain days and 11 hours of daily sunshine. Travel score: 90.3/100 (Excellent). The best time to visit Denver is August.
High
25°C77°F
Low
10°C50°F
🌧️
5
rain days
☀️
11
hrs/day sunshine
💧
49%
humidity
90— Excellent
September in Denver is warm and mostly dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Denver?
How much does it rain in Denver in September?
Denver receives an average of 32.8mm of rainfall across 5 rainy days in September. The annual total is 463.3mm.
What should I pack for Denver in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 15°C from day to night
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
Compare Denver
Popular comparisons:
How can I plan my trip to Denver?
What other cities are near Denver?
What are other popular cities in United States?
What is the weather like in other months in Denver?
Data based on 1994–2024 averages · Last updated: 2024-12-31