Weather in Waterloo in September
Waterloo, United States averages a high of 23.5°C (74.3°F) and low of 13.8°C (56.8°F) in September, with 7 rain days and 10 hours of daily sunshine. Travel score: 84.4/100 (Excellent). The best time to visit Waterloo is September.
High
24°C74°F
Low
14°C57°F
🌧️
7
rain days
☀️
10
hrs/day sunshine
💧
69%
humidity
84— Excellent
September in Waterloo is warm and mostly dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Waterloo?
How much does it rain in Waterloo in September?
Waterloo receives an average of 79.2mm of rainfall across 7 rainy days in September. The annual total is 904.3mm.
What should I pack for Waterloo in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 24°C
🧴
Sunscreen SPF 30+
10 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