Split in September
In September, Split averages 26°C (78°F) during the day and 18°C (64°F) at night, with around 11 days of rain (112 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Split, with some rain to plan around.
How September compares to the rest of the year in Split
September is in the middle of the year for warmth in Split (4th of 12) and one of the driest months (10th of 12). Daytime temperature runs 5°C above the annual average (20°C). September runs 5°C cooler than August (30°C) and cools 5°C in October (21°C).
September sunrise & sunset in Split
Times shown for Split local time (Europe/Zagreb), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Split — September
Golden-hour and blue-hour windows for the 15th of September, in Split's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Split in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Split's popularity.
Crowds & pricing — September in Split
This is a busy month in Split — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Split
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Split — September
Across the year Split's sea swings from 14°C (February) to 26.5°C (August) — September sits at 24.4°C.
Split in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 11°C / 51°F | 4°C / 40°F | 151 mm | 16 | — |
| February | 13°C / 55°F | 5°C / 42°F | 120 mm | 14 | — |
| March | 15°C / 59°F | 7°C / 44°F | 94 mm | 13 | — |
| April | 18°C / 64°F | 10°C / 50°F | 91 mm | 15 | — |
| May | 22°C / 72°F | 15°C / 58°F | 94 mm | 17 | — |
| June | 28°C / 82°F | 19°C / 66°F | 43 mm | 11 | — |
| July | 31°C / 87°F | 22°C / 71°F | 32 mm | 8 | — |
| August | 30°C / 87°F | 22°C / 71°F | 55 mm | 10 | — |
| September | 26°C / 78°F | 18°C / 64°F | 112 mm | 11 | — |
| October | 21°C / 70°F | 13°C / 56°F | 114 mm | 12 | — |
| November | 16°C / 61°F | 10°C / 50°F | 259 mm | 16 | — |
| December | 13°C / 55°F | 6°C / 43°F | 168 mm | 14 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Split in September →
Frequently asked questions
How hot is Split in September?
In September, Split averages a high of 26°C (78°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Split in September?
September can be fairly wet in Split, with about 11 rainy days on average.
Is September a good time to visit Split?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Split in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Split for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.