Zagreb weather in September 2026

Q: How hot is it in Zagreb in September?

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

Q: How sunny is it in Zagreb in September?

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

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

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

Q: Does it rain in Zagreb in September?

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

Expect daytime maximum temperatures of 72°F in Zagreb, Croatia in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 3.8 inches of rainfall in the month.

72
72°F max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
52
52°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
3.8
3.8 inches of monthly rainfall
5
5 (Moderate) UV index

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The September weather guide for Croatia (Zagreb) 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)