Weather in Welwyn Garden City in September
Welwyn Garden City, United Kingdom averages a high of 18.3°C (64.9°F) and low of 11.1°C (52°F) in September, with 9 rain days and 8 hours of daily sunshine. Travel score: 70.5/100 (Good). The best time to visit Welwyn Garden City is July.
High
18°C65°F
Low
11°C52°F
🌧️
9
rain days
☀️
8
hrs/day sunshine
💧
78%
humidity
71— Good
September in Welwyn Garden City is mild and occasionally wet — good for most activities.
What are the average temperatures in Welwyn Garden City?
How much does it rain in Welwyn Garden City in September?
Welwyn Garden City receives an average of 49.9mm of rainfall across 9 rainy days in September. The annual total is 651.9mm.
What should I pack for Welwyn Garden City in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 18°C
Recommended
🧥
Light rain jacket
Some rainy days expected (9 days)
☔
Umbrella
Be prepared for occasional showers
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
Traveling to United Kingdom 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