Early autumn · Weather & things to do
Split in September
Split cools off: highs slip to 77°F (25°C), from 86°F in August, with lows of 65°F (19°C) and about 3.5 in (90 mm) of rain.
At 88/100 for comfort (3rd of 12), it's one of the best months to visit.
- Avg high
- 77°F (25°C)
- Avg low
- 65°F (19°C)
- Rain
- 3.5 in (90 mm)
- Humidity
- 65%
- Cloud cover
- 48%
- Daylight
- ~12 h 17 min
- Comfort score
- 88/100 · Great
What September feels like
Days are warm, averaging 77°F (25°C), easy weather for being outside from morning to evening.
Lows average 65°F (19°C).
Showers are part of the month, adding up to about 3.5 in (90 mm).
Plan around September
September is one of Split's best months on the climate data.
- Last warm month for a while: October highs fall to 69°F.
- The year's biggest cool-down: highs drop 5°C (9°F) from August.
- Comfort holds steady from August (87 → 88/100).
- September sits inside the May – Sep window our Dalmatian Coast route recommends.
What to pack for September
- Light, breathable clotheshighs average 77°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Split in September
September is good outdoor weather here, so these picks lean toward the open air.
Krka National Park
Travertine falls and boardwalks around Skradinski Buk, about an hour from Split.
Why now Our curated notes say it's best May–Jun or Sep.
Diocletian's Palace
4th-century Roman palace whose walls now hold the old town's lanes, cafes and homes.
Zinfandel Food & Wine Bar
Wine bar with a long list of Croatian bottles by the glass.
Marjan Hill
Forested park with stairs to viewpoints and paths to swimming coves.
Why now September scores 88/100 for comfort, good conditions for being outside.
Klis Fortress
Medieval fortress above Split, used as a filming location for Game of Thrones.
Nearby in September
- Hvar in September~23 mi · highs 74°F, 3.1 in rain · 2°C (3°F) cooler by day, about as wet
- Dubrovnik in September~102 mi · highs 76°F, 4.1 in rain · similar daytime temperatures, about as wet
- Piran in September~199 mi · highs 75°F, 4.4 in rain · 1°C (2°F) cooler by day, wetter
- Ljubljana in September~200 mi · highs 71°F, 4.6 in rain · 3°C (6°F) cooler by day, wetter
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~212 m to Split's ~11 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Split in September: quick answers
Is September a good time to visit Split?
Yes. On the climate data it's one of the best months, scoring 88/100. Expect highs of 77°F (25°C) and 3.5 in (90 mm) of rain. September is inside the May – Sep window our Dalmatian Coast route recommends.
How hot is Split in September?
Average highs are 77°F (25°C) and average lows 65°F (19°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Split in September?
Some: about 3.5 in (90 mm) of rain falls across September on average, the 4th-wettest month of the year. The annual total is about 36.3 in (921 mm).
What should I pack for Split in September?
Bring light, breathable clothes (highs average 77°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
Routes in season in September
- Dalmatian Coast May – Sep
Planning Split in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.