September weather forecastAarhus, Denmark

September

Weather in September

The arrival of September in Aarhus sets the stage for transitional weather, as the city moves from summer to autumn. Temperatures decrease noticeably, with the mercury falling to 16.6°C (61.9°F) on average. Red, orange, and yellow foliage begin to color the cityscape, creating dramatic scenery. As the month progresses, rainfall starts to decline compared to the summer months. However, dropping temperatures do not necessarily affect the vicinity of the sea, which remains warmer at 16.6°C (61.9°F).

Temperature

With the onset of September, the average high-temperature in Aarhus subtly recedes from August's 19.9°C (67.8°F) to a still enjoyable 16.6°C (61.9°F). Aarhus observes a consistent average low-temperature of 11.9°C (53.4°F) throughout September nights.

Humidity

In September, the average relative humidity in Aarhus is 80%.

Rainfall

In September, in Aarhus, Denmark, the rain falls for 10.5 days. Throughout September, 26mm (1.02") of precipitation is accumulated. In Aarhus, during the entire year, the rain falls for 142.6 days and collects up to 304mm (11.97") of precipitation.

Snowfall

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

Sea temperature

In Aarhus, in September, the average water temperature is 16.6°C (61.9°F).
Note: Swimming in water that is 16.6°C (61.9°F) is not enjoyable for most. Breathing becomes more challenging to manage as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Aarhus, the average length of the day in September is 12h and 45min.
On the first day of the month, sunrise is at 06:24 and sunset at 20:13. On the last day of September, in Aarhus, sunrise is at 07:21 and sunset at 18:56 CEST.

Sunshine

The average sunshine in September is 7.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Boost your sun resistance with garments that are densely woven yet spacious.

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

Frequently asked questions

In September, the average high-temperature and low-temperature in Aarhus are 16.6°C (61.9°F) and 11.9°C (53.4°F) respectively.

In Aarhus, Denmark, the average relative humidity in September is 80%.

In September, in Aarhus, the rain falls for 10.5 days. Throughout September, 26mm (1.02") of precipitation is accumulated.

May through September are months without snowfall.

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

In September, the average sea temperature in Aarhus is 16.6°C (61.9°F). For swimming, a surface water temperature of 16.6°C (61.9°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).

In Aarhus, the average day length in September is 12h and 45min.

On the first day of September in Aarhus, sunrise is at 06:24 and sunset at 20:13. On the last day of the month, sunrise is at 07:21 and sunset at 18:56 CEST.

In September, the average sunshine duration in Aarhus, Denmark, is 7.6h.

The average daily maximum UV index in September in Aarhus is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

19.9°C

16.6°C

12.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

16.4km/h

17.8km/h

19.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

12.2

15.5

13.1

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Aarhus, Denmark

Average high temperature in September: 16.6°C

The warmest month (with the highest average high temperature) is July (20.2°C).
The month with the lowest average high temperature is February (3°C).

Average low temperature in September: 11.9°C

The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is February (0.3°C).

Average pressure in September
Aarhus, Denmark

Average pressure in September: 1014.6mbar

The month with the highest atmospheric pressure is April (1015.4mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

Average wind speed in September
Aarhus, Denmark

Average wind speed in September: 17.2km/h

The windiest month (with the highest average wind speed) is December (20.6km/h).
The calmest month (with the lowest average wind speed) is July (15.2km/h).

Average humidity in September
Aarhus, Denmark

Average humidity in September: 80%

The month with the highest relative humidity is December (87%).
The months with the lowest relative humidity are April and May (75%).

Average rainfall in September
Aarhus, Denmark

Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is April (16mm).

Average rainfall days in September
Aarhus, Denmark

Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (8.1 days).

Average snowfall in September
Aarhus, Denmark

Average snowfall in September: 0mm

The month with the highest snowfall is January (32mm).
The months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September
Aarhus, Denmark

Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September
Aarhus, Denmark

Average sea temperature in September: 16.6°C

The best month for swimming (with the highest average sea temperature) is August (18.3°C).
The coldest month (with the lowest average sea temperature) is March (3°C).

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

Average daylight in September: 12h and 42min

The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).

Average sunshine in September: 7h and 36min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).

Average sunshine days in September
Aarhus, Denmark

Average sunshine days in September: 15.5 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.9 days).

Average UV index in September
Aarhus, Denmark

Average UV index in September: 4

The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Aarhus, Denmark

Average cloud cover in September: 46

The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 40).

Average visibility in September
Aarhus, Denmark

Average visibility in September: 10km

The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).