Weather in Portsmouth in September
Portsmouth, United Kingdom averages a high of 18.5°C (65.3°F) and low of 12.5°C (54.5°F) in September, with 9 rain days and 9 hours of daily sunshine. Travel score: 72.2/100 (Good). The best time to visit Portsmouth is July.
High
19°C65°F
Low
13°C55°F
🌧️
9
rain days
☀️
9
hrs/day sunshine
💧
78%
humidity
72— Good
September in Portsmouth is mild and occasionally wet — good for most activities.
What are the average temperatures in Portsmouth?
How much does it rain in Portsmouth in September?
Portsmouth receives an average of 54.5mm of rainfall across 9 rainy days in September. The annual total is 727.3mm.
What should I pack for Portsmouth in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 19°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