What September feels like in Copenhagen
For Copenhagen, September is early autumn on the calendar. Days are on the cool side, the kind of weather that suits brisk sightseeing. The gap between afternoon and night is small, so nights are cool and the temperature hardly changes after dark. Damp air makes the cold feel rawer than the numbers alone suggest.
Rain in Copenhagen in September
Expect a mix of dry and wet days, with rain about one day in 3. A rainy day brings about 5.2 mm (0.2 in) on average — steady rain rather than a passing shower. Across the year Copenhagen averages about 5 mm per rainy day, so September is typical.
Daylight and sunshine in September
On 15 September the sun rises at about 6:40 am and sets around 7:31 pm local time, giving 12 h 51 min of daylight. Evenings are drawing in — 2 h 17 min less daylight than mid-August. The sun is out for roughly 69% of those daylight hours, so there are plenty of bright spells.
How September compares to the rest of the year
September is the 4th warmest month of the year in Copenhagen. Compared with August, afternoons are 3.1°C (5.6°F) cooler, with 30 mm less rain. Temperatures keep falling into October. By October, typical highs are 12.4°C (54.3°F).
Who September suits
- Sightseeing: a good fit — comfortable enough to explore on foot all day.
- Parks & outdoor: a good fit — good conditions for sitting outside.
- Beach: less ideal — the sea air is too cool.
Tips for visiting Copenhagen in September
Rain Protection
A compact umbrella and a light waterproof jacket.
Light Jacket
Cool days — a light jacket or sweater for walking around.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Copenhagen in September?
Expect around 17.3°C (63.1°F) in the afternoon and 12.4°C (54.3°F) at night, which most visitors would call cool.
Does it rain a lot in Copenhagen in September?
It does: about 10 rainy days bring roughly 52 mm, so plan some indoor options.
What should I wear in Copenhagen in September?
Based on the averages: rain protection, a light jacket and sunglasses. There is little need to change for the evening.
Is September or October better for visiting Copenhagen?
On our 12-month climate ranking, September comes out ahead (#1 of 12 vs #6). October is cooler and has more rainy days.