Umag weather in September 2026

Q: How hot is it in Umag in September?

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

Q: How sunny is it in Umag in September?

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

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

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

Q: Does it rain in Umag in September?

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

Expect daytime maximum temperatures of 24°C in Umag, Croatia in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 102 mm of rainfall in the month.

24
24°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
15
15°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
102
102 mm of monthly rainfall
5
5 (Moderate) UV index
23
23°C sea temperature

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The September weather guide for Croatia (Umag) 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 / mm) | Imperial (°F / inches)