The climate in Sīwah during September can be summarized as hot and very dry.
September is in the fall / autumn in Sīwah and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 34°C (94°F), whilst at night 19°C (67°F) is normal.
| Daytime temperature | 34.2°C 93.6°F | 
|---|---|
| Nightly temperature | 19.4°C 66.9°F | 
| Average temperature | 26.8°C 80.2°F | 
| Daily sunshine | 11.2 hrs | 
| Avg rainfall | 0 mm 0 ins | 
| Rainy days | 0 days | 
| Sea temperature | 27°C 80.6°F | 
| Humidity | 44% | 
| Windspeed | 10.1kph 6 mph | 
On average September is the 4th driest month of the year in Sīwah with around 0mm 0 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.2 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 Sīwah in September 2025.
Best places to visit in September
| Hottest month: | July | 36.6°C 97.9°F | 
|---|---|---|
| Driest month: | June | 0mm 0ins | 
| Sunniest month: | July | 13.1hrs | 
| Coldest month: | January | 18.8°C 65.8°F | 
| Wettest month: | January | 3mm 0.1ins |