The climate in Sândominic during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Sândominic and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 5°C (40°F) is normal.
| Daytime temperature | 18.4°C 65.1°F | 
|---|---|
| Nightly temperature | 4.6°C 40.3°F | 
| Average temperature | 11.5°C 52.7°F | 
| Daily sunshine | 6.6 hrs | 
| Avg rainfall | 49 mm 1.9 ins | 
| Rainy days | 9 days | 
| Sea temperature | 20.9°C 69.7°F | 
| Humidity | 80% | 
| Windspeed | 7.6kph 5 mph | 
On average September is the 6th wettest month of the year in Sândominic with around 49mm 1.9 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 6.6 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 Sândominic in September 2025.
Best places to visit in September
| Hottest month: | July | 21.4°C 70.5°F | 
|---|---|---|
| Driest month: | February | 32mm 1.3ins | 
| Sunniest month: | August | 7.8hrs | 
| Coldest month: | January | -2.5°C 27.5°F | 
| Wettest month: | June | 107mm 4.2ins |