Copenhagen Weather in September 2026: what to expect (4.5/10)

The month in detail

What to expect in September

Autumn marks the end of peak season in Copenhagen. Temperatures drop (18.0°C) and rain returns (35.0% of days). Expect rain on 35.0% of days — a light raincoat in the bag is recommended.

September ranks 4 out of 12 months in Copenhagen. Compared to August: −2°C daytime, −1.7h of sun per day.

This month's conditions

What it's like in September

UV index

4 · moderate

protect during midday hours

Feels like

comfortable

11°

Sea

18°C

cold, for the brave

Daylight

12.4h of daylight

Air quality

good

AQI 26

Compare

Is September the right month?

The best month in Copenhagen is June (7.6/10), 3.1 pts higher than September.

See June →See all 12 months →

Context

Our verdict

Copenhagen lives its best moments in summer: bicycle city, urban beaches (Amager Strandpark), harbour baths (Islands Brygge, Sluseholmen). June-August are my favourite months (7.9-8.1/10): 13-20°C, 33-42% rain, days stretching to 22h.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

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Stay

Hotels & rentals · Copenhagen

Expedia →

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Activities

Tours, tickets, experiences

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Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Copenhagen

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.

Country · Denmark

🗣️LanguageDanish

💶CurrencyDanish Krone (kr)

🚗DrivingRight-hand

🛡️Safety ⓘVery safe · 1/5

💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTemperate oceanic

📈Climate trend ⓘStable

🔥Hottest monthJune · 20°C

❄️Coolest monthJanuary · 4°C

🌧️Rainiest month ⓘJuly · 42%

🏖️ Beach holiday

📅Peak seasonJuin → Sept

🏖️Swell (Sept–Mar) ⓘModérée

🛂VisaSchengen · 90 days

Explore

Other destinations in September

If September doesn't convince you for this destination, compare with others.

Similar climate

Nearby

GothenburgSweden229 km

BerlinGermany356 km

PoznańPoland462 km

OsloNorway483 km

Other top picks

Cape VerdeCape Verde5.3

SalCape Verde5.6

Marsa AlamEgypt5.8

Sharm el-SheikhEgypt5.8

HurghadaEgypt5.9

← August October →

🗺️ See all 754 destinations on the map

Location

Where is Copenhagen ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Denmark

Temperate oceanic climate with a 7.6 → 0.7 gap between best and worst month. 10 years of ERA5 data to choose by project.

55.68°N · 12.57°E

Questions

Frequently asked questions

What is the best time to visit Copenhagen?

June is the best month with 20.0°C highs, 13.0°C lows, 7.1h of sunshine and 33.0% rainy days. The months of June & July offer comparable conditions.

How many hours of sunshine does Copenhagen get in June?

Copenhagen averages 7.1 sunshine hours per day in June. It is the sunniest month with a climate score of 7.1/10.

What is the rainiest month in Copenhagen?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in Copenhagen in June?

In June, overnight lows reach 13.0°C, while afternoon highs average 20.0°C.

Is Copenhagen good in winter?

In winter (December-February), Copenhagen scores 0.7/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 7.1/10.

When should you avoid Copenhagen?

January is the most difficult month to visit Copenhagen, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Can you swim in Copenhagen in September?

In September, the sea averages 18°C in Copenhagen: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.

Do you need sun protection in Copenhagen in September?

The average UV index reaches 4 in September in Copenhagen (moderate), with about 12.4h of daylight. Protect during midday hours.