Weather in Belfast in September
Belfast, United Kingdom averages a high of 15.9°C (60.6°F) and low of 11.2°C (52.2°F) in September, with 12 rain days and 7.6 hours of daily sunshine. Travel score: 62/100 (Good). The best time to visit Belfast is June.
High
16°C61°F
Low
11°C52°F
🌧️
12
rain days
☀️
7.6
hrs/day sunshine
💧
82%
humidity
62— Good
September in Belfast is mild and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Belfast?
How much does it rain in Belfast in September?
Belfast receives an average of 72.3mm of rainfall across 12 rainy days in September. The annual total is 908.5mm.
What should I pack for Belfast in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 16°C
Recommended
🧥
Light rain jacket
Some rainy days expected (12 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