Weather in South Boston in September
South Boston, United States averages a high of 22.1°C (71.8°F) and low of 14.9°C (58.8°F) in September, with 8 rain days and 9.1 hours of daily sunshine. Travel score: 79.9/100 (Good). The best time to visit South Boston is August.
High
22°C72°F
Low
15°C59°F
🌧️
8
rain days
☀️
9.1
hrs/day sunshine
💧
76%
humidity
80— Good
September in South Boston is warm and mostly dry — good for most activities.
What are the average temperatures in South Boston?
How much does it rain in South Boston in September?
South Boston receives an average of 92.2mm of rainfall across 8 rainy days in September. The annual total is 1110.6mm.
What should I pack for South Boston in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 22°C
🧴
Sunscreen SPF 30+
9 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