Weather in Porvoo in September
Porvoo, Finland averages a high of 15.1°C (59.2°F) and low of 9.4°C (48.9°F) in September, with 9 rain days and 8 hours of daily sunshine. Travel score: 66.6/100 (Good). The best time to visit Porvoo is July.
High
15°C59°F
Low
9°C49°F
🌧️
9
rain days
☀️
8
hrs/day sunshine
💧
80%
humidity
67— Good
September in Porvoo is mild and occasionally wet — good for most activities.
What are the average temperatures in Porvoo?
How much does it rain in Porvoo in September?
Porvoo receives an average of 53.3mm of rainfall across 9 rainy days in September. The annual total is 647.2mm.
What should I pack for Porvoo in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 15°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 Finland 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