Weather in Olsztyn in September
Olsztyn, Poland averages a high of 17.7°C (63.9°F) and low of 10.4°C (50.7°F) in September, with 9 rain days and 8.3 hours of daily sunshine. Travel score: 70.7/100 (Good). The best time to visit Olsztyn is August.
High
18°C64°F
Low
10°C51°F
🌧️
9
rain days
☀️
8.3
hrs/day sunshine
💧
78%
humidity
71— Good
September in Olsztyn is mild and occasionally wet — good for most activities.
What are the average temperatures in Olsztyn?
How much does it rain in Olsztyn in September?
Olsztyn receives an average of 51.7mm of rainfall across 9 rainy days in September. The annual total is 638.4mm.
What should I pack for Olsztyn 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 Poland 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