September weather - Autumn 2024 - Copenhagen, Denmark

Weather in September
Frequently asked questions
Average temperature in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average UV index in September

Ships docked in the Nyhavn District harbor of Copenhagen, Denmark

Weather in September

September sees a dip in temperatures, with values as high as 16.7°C (62.1°F) in Copenhagen. The start of autumn brings in a refreshingly brisk climate, taking over from the heat of summer. The weather leans towards being cool and moist, with more rain than in the summer months. This change in weather presents a majestic transformation of the city's foliage into hues of red and orange.

Temperature

Copenhagen's September weather features a light decline in high-temperatures, reducing from a pleasant 21°C (69.8°F) in August to a refreshing 16.7°C (62.1°F). Copenhagen's temperature tends to fall to an average low of 9.7°C (49.5°F) during the nights of September.

Humidity

In Copenhagen, the average relative humidity in September is 78%.

Rainfall

The month with the most rainfall is September, when the rain falls for 13.6 days and typically aggregates up to 59mm (2.32") of precipitation.

Snowfall

In Copenhagen, snow does not fall in May through September.

Sea temperature

In Copenhagen, Denmark, in September, the average water temperature is 16.3°C (61.3°F).
Note: For the majority of people, swimming in water at 16.3°C (61.3°F) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in September in Copenhagen is 12h and 44min.
On the first day of September, sunrise is at 06:15 and sunset at 20:03. On the last day of the month, sunrise is at 07:11 and sunset at 18:47 CEST.

Sunshine

The average sunshine in September in Copenhagen, Denmark, is 5.1h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.

Updated: Jan 26, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are September temperatures in Copenhagen?

During September, Copenhagen experiences an average high-temperature of 16.7°C (62.1°F) and a low-temperature of 9.7°C (49.5°F).

What is the average humidity in September in Copenhagen?

The average relative humidity in September in Copenhagen is 78%.

What is the wettest month in Copenhagen?

September is the month with the most rainfall in Copenhagen, Denmark. Rain falls for 13.6 days and accumulates 59mm (2.32") of precipitation.

How many days does it rain in September in Copenhagen?

In September, the rain falls for 13.6 days. Throughout September, 59mm (2.32") of precipitation is accumulated.

When it does not snow in Copenhagen?

In Copenhagen, Denmark, snow does not fall in May through September.

Does it snow in Copenhagen in September?

In Copenhagen, in September, it doesn't snow. In October, it regularly snows.

What is the sea water temperature in September in Copenhagen?

In September, the average sea temperature in Copenhagen is 16.3°C (61.3°F). For swimming, a surface water temperature of 16.3°C (61.3°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Copenhagen have in September?

The average day length in September in Copenhagen, Denmark, is 12h and 44min.

What time are sunrise and sunset in September in Copenhagen?

On the first day of September in Copenhagen, sunrise is at 06:15 and sunset at 20:03. On the last day of the month, sunrise is at 07:11 and sunset at 18:47 CEST.

How long on average sun shines in September in Copenhagen?

In September, the average sunshine duration is 5.1h.

How high is the UV index in September in Copenhagen?

In Copenhagen, Denmark, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

21°C 69.8°F

16.7°C 62.1°F

11.9°C 53.4°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

13.6

14.5

Average snowfall days

0.2

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in September
Copenhagen, Denmark

Average high temperature in September: 16.7°C

The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (2.5°C).

Average low temperature in September: 9.7°C

The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is February (-1.9°C).

Average humidity in September
Copenhagen, Denmark

Average humidity in September: 78%

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are May and June (72%).

Average rainfall in September
Copenhagen, Denmark

Average rainfall in September: 58.9mm

The wettest month (with the highest rainfall) is September (58.9mm).
The driest month (with the least rainfall) is February (22.7mm).

Average rainfall days in September
Copenhagen, Denmark

Average rainfall days in September: 13.6 days

The months with the highest number of rainy days are November and December (15.4 days).
The month with the least rainy days is May (10.8 days).

Average snowfall days in September
Copenhagen, Denmark

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September
Copenhagen, Denmark

Average sea temperature in September: 16.3°C

The best month for swimming (with the highest average sea temperature) is August (17.8°C).
The coldest month (with the lowest average sea temperature) is February (2.3°C).

Average daylight in September /
Average sunshine in September
Copenhagen, Denmark

Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 6min).

Average sunshine in September: 5h and 1min

The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 12min).

Average UV index in September
Copenhagen, Denmark

Average UV index in September: 3

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 0).

September weather forecast
Copenhagen, Denmark

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