The climate in Piatra Olt during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Piatra Olt and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (77°F), whilst at night 12°C (53°F) is normal.
| Daytime temperature | 24.8°C 76.6°F | 
|---|---|
| Nightly temperature | 11.7°C 53°F | 
| Average temperature | 18.2°C 64.8°F | 
| Daily sunshine | 8.1 hrs | 
| Avg rainfall | 36 mm 1.4 ins | 
| Rainy days | 6 days | 
| Sea temperature | 22°C 71.6°F | 
| Humidity | 72% | 
| Windspeed | 7.9kph 5 mph | 
On average September is the 2nd driest month of the year in Piatra Olt with around 36mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.1 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 Piatra Olt in September 2025.
Best places to visit in September
| Hottest month: | July | 28.4°C 83.1°F | 
|---|---|---|
| Driest month: | October | 34mm 1.3ins | 
| Sunniest month: | August | 9.9hrs | 
| Coldest month: | January | 1.3°C 34.3°F | 
| Wettest month: | June | 77mm 3ins |