September weather forecast
Denmark

September heralds the onset of autumn in Denmark. Temperatures begin their gradual descent from summer highs, with averages ranging from 12.8°C (55°F) to 22.2°C (72°F) at the start of the month, cooling down as the weeks progress. Despite this, early September can still offer comfortable warmth, particularly in the first half.

Precipitation during September is quite frequent. Although the rainfall totals are lower than in the peak summer months, the frequency of showers starts to increase. Nevertheless, these rains are often short-lived, posing minimal disruption to outdoor activities.

The sea temperatures start to cool down in September, marking the transition from summer to autumn. This is most noticeable along the western Jutland coasts, where the moderating influence of the North Sea begins to wane.

The daylight hours continue to decrease, marking a shift from the long summer days. However, the days remain relatively bright and long, especially in the early part of the month.

September is also the month when wind speeds begin to increase, particularly in the second half of the month. It is not uncommon for September to be a windy month, with gusts reaching speeds from 16.1km/h (10mph) to 30.6km/h (19mph), marking the start of the windy autumn period.

Despite these changes, the early part of September still offers comfortable weather with the landscape bathed in the bright colours of autumn. It remains a good time to explore Denmark, especially for those who prefer cooler temperatures and the vibrant hues of the fall season.

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• Copenhagen - September »
  In Copenhagen in September, the average water temperature is 16.3°C (61.3°F). In Copenhagen, Denmark, snow does not fall in May through September.
• Aarhus - September »
  In Aarhus, in September, the average water temperature is 16.6°C (61.9°F). On the last day of September, in Aarhus, sunrise is at 07:21 and sunset at 18:56 CEST.
• Odense - September »
  September brings with it the onset of autumn in Odense with a dip in temperature and lesser daylight hours. In Odense in September, it is raining for 10.6 days, with typically 26mm (1.02") of accumulated precipitation.
• Aalborg - September »
  In Aalborg, in September, it is raining for 15.9 days, with typically 36mm (1.42") of accumulated precipitation. On the first day of September in Aalborg, sunrise is at 06:23 and sunset at 20:16.
• Esbjerg - September »
  On the first day of September in Esbjerg, sunrise is at 06:32 and sunset at 20:19. How many days does it rain in September in Esbjerg?
• Randers - September »
  In Randers, during September, the rain falls for 12.4 days and regularly aggregates up to 28mm (1.1") of precipitation. How many days does it rain in September in Randers?
• Kolding - September »
  On the last day of September, in Kolding, sunrise is at 07:23 and sunset at 18:59 CEST. In Kolding, during September, the rain falls for 13.8 days and regularly aggregates up to 33mm (1.3") of precipitation.
• Horsens - September »
  In Horsens in September, it is raining for 13.1 days, with typically 27mm (1.06") of accumulated precipitation. In Horsens, in September, during 13.1 rainfall days, 27mm (1.06") of precipitation is typically accumulated.
• Vejle - September »
  In Vejle in September, during 13.1 rainfall days, 27mm (1.06") of precipitation is typically accumulated. In Vejle, in September, it is raining for 13.1 days, with typically 27mm (1.06") of accumulated precipitation.
• Roskilde - September »
  On the last day of September, in Roskilde, sunrise is at 07:13 and sunset at 18:49 CEST. In Roskilde in September, the average water temperature is 16.4°C (61.5°F).
• Herning - September »
  On the first day of September in Herning, sunrise is at 06:29 and sunset at 20:18. September's onset in Herning brings a negligible change in high-temperatures, falling from a pleasant 20.3°C (68.5°F) in August to a refreshing 16.9°C (62.4°F).
• Silkeborg - September »
  In Silkeborg, during September, the rain falls for 8.7 days and regularly aggregates up to 20mm (0.79") of precipitation. On the first day of September in Silkeborg, sunrise is at 06:26 and sunset at 20:16.