Weather in Philadelphia in September
Philadelphia, United States averages a high of 25.3°C (77.5°F) and low of 16.3°C (61.3°F) in September, with 9 rain days and 9.2 hours of daily sunshine. Travel score: 84/100 (Excellent). The best time to visit Philadelphia is August.
High
25°C78°F
Low
16°C61°F
🌧️
9
rain days
☀️
9.2
hrs/day sunshine
💧
70%
humidity
84— Excellent
September in Philadelphia is warm and occasionally wet — excellent conditions for exploring.
What are the average temperatures in Philadelphia?
How much does it rain in Philadelphia in September?
Philadelphia receives an average of 99.3mm of rainfall across 9 rainy days in September. The annual total is 1099.8mm.
What should I pack for Philadelphia in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (9 days)
☔
Umbrella
Be prepared for occasional showers
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Data based on 1994–2024 averages · Last updated: 2024-12-31