Climate almanac
Sejny
Podlasie, Poland · 54.11°, 23.35°
What is the weather like in Sejny in September?
In September, Sejny is typically 66°F (19°C) during the day and 49°F (10°C) at night. The month brings about 2.1 in (54 mm) of precipitation in total.
- Average high66°F (19°C)
- Average low49°F (10°C)
- Precipitation2.1 in (54 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)