Climate almanac
Sejny
Podlasie, Poland · 54.11°, 23.35°
What is the climate like in Sejny?
The best time to visit Sejny is typically May – June, with trip comfort peaking in June (6.9/10). Sejny is warmest in August, when daily highs average 74°F (23°C), and coolest in January, when lows fall to about 25°F (-4°C). The wettest month is typically July and the driest is March; the year sees roughly 28 in (703 mm) of precipitation.
- Best time to visitMay – June — comfort peaks in June (6.9/10)
- Warmest monthAugust — average high 74°F (23°C)
- Coolest monthJanuary — average low 25°F (-4°C)
- Wettest monthJuly (3.9 in (99 mm))
- Driest monthMarch (1.5 in (39 mm))
- Annual precipitation28 in (703 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromLazdijai, 18 km away (1970-2009)