Vilnius weather in September
September in Vilnius: cool, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Vilnius · #317 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Vilnius climate normals — September
| Daytime high | 17°C / 63°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 43 mm / 1.7 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 8 h/day | |
| Daylight | 12.7 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Vilnius in September — FAQ
- Is September a good time to visit Vilnius?
- September in Vilnius: cool, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Vilnius on SeasonMap's comfort score (80/100).
- What is the weather like in Vilnius in September?
- In September, Vilnius averages a daily high of 17.3°C and a low of 9.9°C, with about 42.7 mm of rain over roughly 7.4 rainy days.
- What is the air quality in Vilnius in September?
- Vilnius has a mean US Air Quality Index of about 35 in September.