September
Weather in September
September initiates a mild cooling trend in De Haan. The sea temperature recedes slightly from its peak to around 18.2°C (64.8°F). The daylight hours start to shrink but do not affect the overall warmth. Rainfall is unpredictable, with both dry and wet days possible. Despite the decrease in temperature, the weather still holds onto the remnants of summer.
Note: Most people do not enjoy swimming in water of 18.2°C (64.8°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
On the first day of September, sunrise is at 07:01 and sunset at 20:33. On the last day of the month, sunrise is at 07:47 and sunset at 19:27 CEST.
Sea temperature
In De Haan, the average seawater temperature in September is 18.2°C (64.8°F).Note: Most people do not enjoy swimming in water of 18.2°C (64.8°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In De Haan, the average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 07:01 and sunset at 20:33. On the last day of the month, sunrise is at 07:47 and sunset at 19:27 CEST.
Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the sea water temperature in September in De Haan?
In De Haan, Belgium, in September, the average water temperature is 18.2°C (64.8°F). For swimming, a surface water temperature of 18.2°C (64.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
How many hours of daylight does De Haan have in September?
The average day length in September is 12h and 38min.
When are sunrise and sunset in September in De Haan?
On the first day of September in De Haan, Belgium, sunrise is at 07:01 and sunset at 20:33. On the last day of the month, sunrise is at 07:47 and sunset at 19:27 CEST.
Average sea temperature in September
De Haan, Belgium
- Average sea temperature in September: 18.2°C
The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is March (7.1°C).
Average daylight in September
De Haan, Belgium
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
