Climate averages 1991–2020
Split weather
in September.
A warm, wet month: the 4th warmest and the 7th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Split: daytime highs average 24.2°C and nights cool to about 16.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 103 mm of rain on roughly 8 days, which makes September a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 33 min on an average September day.
The nearest other city in this atlas is Mostar (112 km away). In September its highs average 24.2°C, about as warm as Split, with 135 mm of rain.
Among the 4 cities listed in Croatia, Split ranks 1st of 4 for the warmest September highs and 3rd of 4 for the driest September (rainfall, lowest first). The mean September high of those 4 cities is 22.7°C; Split is 1.5°C warmer than that mean.
From September to October, average highs fall by 4.4°C to 19.8°C, and monthly rainfall rises from 103 mm to 137 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Split climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.0°C3.8°C | 3.8°C | 121 | 11.2 | 9.39 h |
| February | 10.9°C3.7°C | 3.7°C | 107 | 9.8 | 10.510 h |
| March | 13.8°C6.2°C | 6.2°C | 102 | 9.7 | 11.912 h |
| April | 17.2°C9.5°C | 9.5°C | 99 | 11.0 | 13.413 h |
| May | 21.6°C13.8°C | 13.8°C | 71 | 9.2 | 14.715 h |
| June | 25.9°C17.8°C | 17.8°C | 42 | 6.7 | 15.415 h |
| July | 28.8°C20.2°C | 20.2°C | 25 | 4.6 | 15.115 h |
| August | 29.2°C20.5°C | 20.5°C | 40 | 4.5 | 14.014 h |
| September, selected | 24.2°C16.6°C | 16.6°C | 103 | 7.7 | 12.613 h |
| October | 19.8°C12.9°C | 12.9°C | 137 | 11.1 | 11.111 h |
| November | 15.1°C9.1°C | 9.1°C | 222 | 13.9 | 9.710 h |
| December | 11.1°C5.1°C | 5.1°C | 173 | 12.6 | 9.09 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Mostar in SeptemberBosnia and Herzegovina · 112 kmHigh 24.2°C · Low 13.8°C · 135 mm rain
- Zenica in SeptemberBosnia and Herzegovina · 140 kmHigh 21.9°C · Low 12.5°C · 94 mm rain
- Bihać in SeptemberBosnia and Herzegovina · 152 kmHigh 21.6°C · Low 12.4°C · 124 mm rain
- Banja Luka in SeptemberBosnia and Herzegovina · 154 kmHigh 22.2°C · Low 12.0°C · 95 mm rain
- Ilidža in SeptemberBosnia and Herzegovina · 154 kmHigh 21.1°C · Low 12.0°C · 91 mm rain
- Sarajevo in SeptemberBosnia and Herzegovina · 159 kmHigh 21.1°C · Low 11.7°C · 91 mm rain
- Tuzla in SeptemberBosnia and Herzegovina · 212 kmHigh 22.1°C · Low 12.3°C · 86 mm rain
- Pescara in SeptemberItaly · 216 kmHigh 24.1°C · Low 16.6°C · 68 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Split) is explained once on the Split year overview and on the Sources, method and limits page.