Weather in Green Bay in September
Green Bay, United States averages a high of 22°C (71.6°F) and low of 13.5°C (56.3°F) in September, with 8 rain days and 9.6 hours of daily sunshine. Travel score: 81/100 (Excellent). The best time to visit Green Bay is July.
High
22°C72°F
Low
14°C56°F
🌧️
8
rain days
☀️
9.6
hrs/day sunshine
💧
71%
humidity
81— Excellent
September in Green Bay is warm and occasionally wet — excellent conditions for exploring.
What are the average temperatures in Green Bay?
How much does it rain in Green Bay in September?
Green Bay receives an average of 63.3mm of rainfall across 8 rainy days in September. The annual total is 772.2mm.
What should I pack for Green Bay in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 22°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (8 days)
☔
Umbrella
Be prepared for occasional showers
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