Cluj-Napoca Weather in September
What's the weather like in Cluj-Napoca (Cluj) in September 2025?
The climate in Cluj-Napoca during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Cluj-Napoca and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 20.4°C 68.7°F |
|---|---|
| Nightly temperature | 8.6°C 47.5°F |
| Average temperature | 14.5°C 58.1°F |
| Daily sunshine | 7.3 hrs |
| Avg rainfall | 40 mm 1.6 ins |
| Rainy days | 9 days |
| Sea temperature | 21°C 69.9°F |
| Humidity | 77% |
| Windspeed | 6.8kph 4 mph |
On average September is the 6th wettest month of the year in Cluj-Napoca with around 40mm 1.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.3 hours of sunshine per day.
September temperatures in Cluj-Napoca
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 Cluj-Napoca in September 2025.
Other monthly averages
Best places to visit in September
Cluj-Napoca weather stats
| Hottest month: | July | 23.8°C 74.8°F |
|---|---|---|
| Driest month: | March | 29mm 1.1ins |
| Sunniest month: | August | 8.9hrs |
| Coldest month: | January | 0.1°C 32.2°F |
| Wettest month: | June | 91mm 3.6ins |
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