September in Copenhagen averages highs of 18 °C (64 °F) and lows of 13 °C (55 °F), with about 7 rainy days and 12 h 38 min of daylight. The sea is cold, around 18 °C (64 °F).
September weather in Copenhagen at a glance
average high to low each dot ≈ 3 rainy days
Is September a good time to visit Copenhagen?
Mixed weather: cool and some rain. September is usually shoulder season in Copenhagen: fewer crowds than peak months, with prices often a little lower.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in September 2026
No public holidays fall in September 2026 in Denmark, so opening hours should be normal.
Things to do in Copenhagen in September
September's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Nyhavn — canal houses outdoors
- Tivoli Gardens — open in seasons, magical at night outdoors
- Harbour baths and a canal tour — swim in summer outdoors
- Rosenborg Castle and King's Garden — crown jewels indoors
- Louisiana Museum — 35 min north by train indoors
- Torvehallerne food halls indoors
Where to stay: Indre By for sights; Vesterbro or Nørrebro for food and value; Christianshavn for canals.
What to pack for Copenhagen in September
- Layers and a light jacket: days around 18 °C (64 °F), nights near 13 °C (55 °F).
- Comfortable walking shoes.
What a day in Copenhagen costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €80–170 | €220–420 |
Excluding flights. September is usually shoulder season in Copenhagen: fewer crowds than peak months, with prices often a little lower.
September in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Berlin | 21° / 12° | 6 | Good time to go |
| Amsterdam | 19° / 12° | 10 | Good time to go |
| Prague | 21° / 11° | 6 | Good time to go |
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is September a good time to visit Copenhagen?
By the numbers, September is a mixed month: cool and some rain, with average highs of 18 °C (64 °F) and about 7 rainy days. September is usually shoulder season in Copenhagen: fewer crowds than peak months, with prices often a little lower. The best months for weather are June, July, August.
How warm is Copenhagen in September?
Average highs are 18 °C (64 °F) and lows 13 °C (55 °F) (2015–2024 averages). The sea is cold, around 18 °C (64 °F).
Does it rain a lot in Copenhagen in September?
Expect about 7 days with 2 mm of rain or more, about 57 mm in total. It is the 5th driest month of the year in Copenhagen.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.