Weather in Fort Collins in September
Fort Collins, United States averages a high of 24.6°C (76.3°F) and low of 10.1°C (50.2°F) in September, with 5 rain days and 11 hours of daily sunshine. Travel score: 89.8/100 (Excellent). The best time to visit Fort Collins is August.
High
25°C76°F
Low
10°C50°F
🌧️
5
rain days
☀️
11
hrs/day sunshine
💧
55%
humidity
90— Excellent
September in Fort Collins is warm and mostly dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Fort Collins?
How much does it rain in Fort Collins in September?
Fort Collins receives an average of 35mm of rainfall across 5 rainy days in September. The annual total is 440.5mm.
What should I pack for Fort Collins 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.
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Data based on 1994–2024 averages · Last updated: 2024-12-31