Osijek weather in September 2026

Q: How hot is it in Osijek in September?

Daytime temperatures usually reach 25°C in Osijek in September with low heat and humidity, falling to 14°C at night.

Q: How sunny is it in Osijek in September?

There are normally 8 hours of bright sunshine each day in Osijek in September - that's 62% of daylight hours.

Q: How warm is the sea around Osijek in September?

The average sea temperature around Osijek in September is 22°C.

Q: Does it rain in Osijek in September?

There are usually 10 days with some rain in Osijek in September and the average monthly rainfall is 75mm.

Expect daytime maximum temperatures of 73°F in Osijek, Croatia in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 1.8 inches of rainfall in the month.

73
73°F max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
52
52°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
1.8
1.8 inches of monthly rainfall
5
5 (Moderate) UV index

More about Osijek

Osijek by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Croatia

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

The September weather guide for Croatia (Osijek) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)