Zagreb weather in September
September in Zagreb: nice, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Zagreb · #82 of 604 destinations to visit in September · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Zagreb climate normals — September
| Daytime high | 23°C / 74°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 56°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 84 mm / 3.3 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 14°C / 56°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 12.5 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Zagreb in September — FAQ
- Is September a good time to visit Zagreb?
- September in Zagreb: nice, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Zagreb on SeasonMap's comfort score (90/100).
- What is the weather like in Zagreb in September?
- In September, Zagreb averages a daily high of 23.2°C and a low of 13.5°C, with about 84 mm of rain over roughly 10 rainy days.
- What is the air quality in Zagreb in September?
- Zagreb has a mean US Air Quality Index of about 43 in September.