Split weather in September
September in Split: warm, rainy, with clean air — one of the best months to visit.
#2 of 12 months in Split · #182 of 604 destinations to visit in September · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Split climate normals — September
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 94 mm / 3.7 in | 🌧 rainy |
| Rainy days | 8 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 12.5 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Split in September — FAQ
- Is September a good time to visit Split?
- September in Split: warm, rainy, with clean air — one of the best months to visit. It ranks #2 of 12 months for Split on SeasonMap's comfort score (86/100).
- What is the weather like in Split in September?
- In September, Split averages a daily high of 25.8°C and a low of 18°C, with about 93.6 mm of rain over roughly 7.6 rainy days.
- What is the air quality in Split in September?
- Split has a mean US Air Quality Index of about 42 in September.