Avg weather in September
12 Hrs per day
67 mm per month
77 % avg
11 Mph avg

Copenhagen Weather in September

What’s the weather like in Copenhagen in September?

The Copenhagen weather in September isn’t as hot as the previous three months but temperatures are still mild to warm. You can expect some light summer showers, but you’ll be free from the autumn and winter winds and will be able to see a good deal of Scandinavian sunshine.

Geographical influences

Denmark’s capital, on the east coast of the country, enjoys an oceanic climate. Inland temperatures are influenced by the nearby Baltic Sea and as the waters are mild at this time it helps to keep conditions in Copenhagen warm and comfortable.


Pack a warm layer for cooler days and a waterproof jacket too. Your trip to Denmark this month will see average rainfall of 60mm, with about 14 days getting rain. The mild weather in Copenhagen in September produces five hours of sunshine from 13 hours of daylight. The sun will rise at 6.30am and set just before 8pm. High temperatures could reach 17°C on the best days, with cloud cover making it feel a little cooler. The nights may be about 12°C. The water temperature drops from the summer highs to 15°C, on average, so it may be a little too chilly for a splash.

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