Magical Split
The best travel time to Split in Croatia is from May til October and the best months are May, June and September.
Omiš Weather in September
In Omiš, September brings high daytime temperatures around 23°C (73°F), with nights cooling to 17°C (63°F). Expect quite a bit of rainfall this month.
Rainfall in Omiš in September
Historically, September sees about 10 days of rain, with a monthly average of 105 mm (4.1 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Omiš in September
Temperatures in Omiš in September top out at 23°C (73°F) and drop to 17°C (63°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Omiš in September
There are approximately 250 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July and August typically offer the best weather for Omiš.
Omiš Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
23°C (73°F)
Chance of Rain
32%
Precipitation
105 mm (4.1 in)
Rainy days
10 days
Sunshine
250 hours
Percentage Sunshine
Omiš Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Omiš - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Omiš typically drop from around 27°C (81°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 19°C (66°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Omiš in September
Browse day-by-day weather records for Omiš spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Omiš historical weather extremes in September
The extremes listed below come from historical weather data collected in Omiš from 1993 through 2025.
- On September 1, 2024, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- On September 6, 2007, Omiš saw its coldest September day with temperatures maxing out at 15°C (59°F).
- The coldest night in September in Omiš was on September 30, 1995, with a minimum of 7°C (45°F).
Best Places in Croatia in September
Find out more about the weather in Croatia and which places have the best travel conditions in this month. See all of Croatia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Omiš in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Omiš in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Omiš 3-Day Forecast
More climate data for Omiš
See the full Omiš climate overview or explore weather in Croatia.
Popular in September
Where to go in September - average daytime high across popular destinations.
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