The climate in Cristuru Secuiesc during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Cristuru Secuiesc and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 7°C (44°F) is normal.
| Daytime temperature | 20.7°C 69.2°F | 
|---|---|
| Nightly temperature | 6.8°C 44.2°F | 
| Average temperature | 13.7°C 56.7°F | 
| Daily sunshine | 6.8 hrs | 
| Avg rainfall | 46 mm 1.8 ins | 
| Rainy days | 9 days | 
| Sea temperature | 20.9°C 69.7°F | 
| Humidity | 80% | 
| Windspeed | 5.8kph 4 mph | 
On average September is the 6th wettest month of the year in Cristuru Secuiesc with around 46mm 1.8 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 6.8 hours of sunshine per day.
				
						
						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 Cristuru Secuiesc in September 2025.
Best places to visit in September
| Hottest month: | July | 23.7°C 74.7°F | 
|---|---|---|
| Driest month: | February | 28mm 1.1ins | 
| Sunniest month: | August | 8.2hrs | 
| Coldest month: | January | -0.6°C 30.9°F | 
| Wettest month: | June | 99mm 3.9ins |