The climate in Héliopolis during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Héliopolis and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 16°C (61°F) is normal.
Daytime temperature | 27.8°C 82°F |
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Nightly temperature | 16.3°C 61.3°F |
Average temperature | 22°C 71.6°F |
Daily sunshine | 9.3 hrs |
Avg rainfall | 36 mm 1.4 ins |
Rainy days | 6 days |
Sea temperature | 24.9°C 76.8°F |
Humidity | 63% |
Windspeed | 7.9kph 5 mph |
On average September is the 4th driest month of the year in Héliopolis 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 9.3 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 Héliopolis in September 2025.
Best places to visit in September
Hottest month: | August | 30.3°C 86.5°F |
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Driest month: | July | 6mm 0.2ins |
Sunniest month: | July | 12hrs |
Coldest month: | January | 13.7°C 56.7°F |
Wettest month: | December | 108mm 4.3ins |