Zagreb Weather in September
What's the weather like in Zagreb (Grad Zagreb) in September 2025?
The climate in Zagreb during September can be summarized as mild and a little damp.
September is in the fall / autumn in Zagreb and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 12°C (53°F) is normal.
| Daytime temperature | 21.9°C 71.4°F |
|---|---|
| Nightly temperature | 11.5°C 52.7°F |
| Average temperature | 16.7°C 62.1°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 96 mm 3.8 ins |
| Rainy days | 12 days |
| Sea temperature | 22.6°C 72.7°F |
| Humidity | 76% |
| Windspeed | 5.8kph 4 mph |
On average September is the 6th driest month of the year in Zagreb with around 96mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
September temperatures in Zagreb
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Zagreb in September 2025.
Other monthly averages
Best places to visit in September
Zagreb weather stats
| Hottest month: | July | 26.1°C 79°F |
|---|---|---|
| Driest month: | February | 70mm 2.8ins |
| Sunniest month: | July | 9.7hrs |
| Coldest month: | January | 2.5°C 36.5°F |
| Wettest month: | November | 114mm 4.5ins |
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