Weather in Ostrołęka in September
Ostrołęka, Poland averages a high of 18.2°C (64.8°F) and low of 10.3°C (50.5°F) in September, with 9 rain days and 8.2 hours of daily sunshine. Travel score: 71.7/100 (Good). The best time to visit Ostrołęka is August.
High
18°C65°F
Low
10°C51°F
🌧️
9
rain days
☀️
8.2
hrs/day sunshine
💧
76%
humidity
72— Good
September in Ostrołęka is mild and occasionally wet — good for most activities.
What are the average temperatures in Ostrołęka?
How much does it rain in Ostrołęka in September?
Ostrołęka receives an average of 51.7mm of rainfall across 9 rainy days in September. The annual total is 614.2mm.
What should I pack for Ostrołęka 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
🎉Visiting Poland in September?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31