September weather forecast
Aarhus, Denmark

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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 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.

Temperature

The move into September indicates a slight reduction in the average high-temperature, down from August's 19.9°C to a still comfortable 16.6°C. Aarhus experiences an average nighttime temperature of 11.9°C in September, reflecting a minor difference from the day's peak.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In September, in Aarhus, Denmark, the rain falls for 10.5 days. Throughout September, 26mm of precipitation is accumulated. Throughout the year, in Aarhus, there are 142.6 rainfall days, and 304mm of precipitation is accumulated.

Snowfall

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

Sea temperature

In Aarhus, the average seawater temperature in September is 16.6°C.
Note: The majority of individuals do not enjoy swimming in water that is 16.6°C. Breathing control becomes more challenging as the water temperature dips from 21°C to 15°C.

Daylight

In Aarhus, the average length of the day in September is 12h and 45min.
On the first day of September in Aarhus, sunrise is at 06:22 and sunset at 20:15. On the last day of the month, sunrise is at 07:19 and sunset at 18:58 CEST.

Sunshine

The average sunshine in September in Aarhus is 7.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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FAQ

What is the temperature in September in Aarhus?

The average high-temperature, in September, in Aarhus, is 16.6°C, while the average low-temperature is 11.9°C.

What is the average humidity in September in Aarhus?

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

How many days does it rain in September in Aarhus?

In Aarhus, Denmark, in September, during 10.5 rainfall days, 26mm of precipitation is typically accumulated.

When it does not snow in Aarhus?

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

Does it snow in Aarhus in September?

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

What is the sea water temperature in September in Aarhus?

In Aarhus, Denmark, in September, the average water temperature is 16.6°C. For swimming, a surface water temperature of 16.6°C 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.

What is the average length of the day in September in Aarhus?

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

What time are sunrise and sunset in September in Aarhus?

In September, on the first day of the month, sunrise is at 06:22 and sunset at 20:15. On the last day of the month, in Aarhus, sunrise is at 07:19 and sunset at 18:58 CEST.

How many hours of sunshine does Aarhus have in September?

The average sunshine duration in September in Aarhus is 7.6h.

What is the UV index intensity in September in Aarhus?

In Aarhus, Denmark, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
19.9°C
16.6°C
12.1°C
Average low temperature
14.1°C
11.9°C
8.5°C
Average pressure
1013.4mbar
1014.6mbar
1014.3mbar
Average wind speed
15.6km/h
17.2km/h
18.8km/h
Average max. wind speed
16.4km/h
17.8km/h
19.9km/h
Average wind speed gusts
23.7km/h
26.6km/h
29.1km/h
Average humidity
77%
80%
83%
Average rainfall
36mm
26mm
29mm
Average rainfall days
14.7
10.5
13.4
Average snowfall
0mm
0mm
2mm
Average snowfall days
0
0
0.4
Average sea temperature
18.3°C
16.6°C
12.6°C
Average daylight
15h 0min
12h 4min
10h 2min
Average sunshine
9h 1min
7h 4min
4h 1min
Average sunshine days
12.2
15.5
13.1
Average UV index
4
4
2
Average cloud cover
41%
46%
56%
Average visibility
10km
10km
9km

Average temperature in September
Aarhus, Denmark

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).

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Average pressure in September
Aarhus, Denmark

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).

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Average wind speed in September
Aarhus, Denmark

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).

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Average humidity in September
Aarhus, Denmark

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%).

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Average rainfall in September
Aarhus, Denmark

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).

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Average rainfall days in September
Aarhus, Denmark

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).

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Average snowfall in September
Aarhus, Denmark

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).

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Average snowfall days in September
Aarhus, Denmark

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).

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Average sea temperature in September
Aarhus, Denmark

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).

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

Average daylight in September / Average sunshine in September - Aarhus, Denmark
  • Average daylight in September: 12h and 4min

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 4min

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).

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Average sunshine days in September
Aarhus, Denmark

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).

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Average UV index in September
Aarhus, Denmark

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).

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Average cloud cover in September
Aarhus, Denmark

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).

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Average visibility in September
Aarhus, Denmark

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).

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Aarhus, Denmark

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