Weather in September
September marks the transition from summer to autumn in the city of Holbæk. The Baltic Sea, cooling down to a moderate 16.6°C (61.9°F), announces the retreat of summer. As the sea temperature declines, so does the atmospheric temperature, forecasting the arrival of the cooler autumn months. Despite this, locals and visitors still enjoy a good amount of daylight, perfect for outdoor pursuits and experiencing the city's changing foliage. This period exhibits an elegant balance between the warmth of summer and the freshness of approaching autumn.
Note: Most people find it challenging to enjoy swimming in water that is 16.6°C (61.9°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.
On the first day of September, sunrise is at 06:19 and sunset at 20:06. On the last day of the month, sunrise is at 07:15 and sunset at 18:50 CEST.
[Resources]Sea temperature
In Holbæk, Denmark, in September, the average water temperature is 16.6°C (61.9°F).Note: Most people find it challenging to enjoy swimming in water that is 16.6°C (61.9°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.
Daylight
In Holbæk, the average length of the day in September is 12h and 44min.On the first day of September, sunrise is at 06:19 and sunset at 20:06. On the last day of the month, sunrise is at 07:15 and sunset at 18:50 CEST.
Frequently asked questions
What is the sea temperature in September in Holbæk?
In Holbæk, Denmark, in September, the average water temperature is 16.6°C (61.9°F). For swimming, a surface water temperature of 16.6°C (61.9°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).
What is the average length of the day in September in Holbæk?
The average day length in September is 12h and 44min.
When is the sunrise / sunset in September in Holbæk?
On the first day of September in Holbæk, Denmark, sunrise is at 06:19 and sunset at 20:06. On the last day of the month, sunrise is at 07:15 and sunset at 18:50 CEST.
Average sea temperature in September
Holbæk, Denmark
- Average sea temperature in September: 16.6°C
The best month for swimming (with the highest average sea temperature) is August (18.5°C).
The coldest month (with the lowest average sea temperature) is January (2.1°C).
Average daylight in September
Holbæk, Denmark
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 6min).
Holbæk, Denmark
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