Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signifies a minor drop in average high-temperature, transitioning from an agreeable 20.3°C (68.5°F) in August to a refreshing 17°C (62.6°F). Sønderborg, in September, logs an average low-temperature of 12.7°C (54.9°F), a subtle step down from daytime readings.Humidity
The average relative humidity in September in Sønderborg is 80%.Rainfall
In Sønderborg, in September, it is raining for 14.2 days, with typically 24mm (0.94") of accumulated precipitation. Throughout the year, in Sønderborg, Denmark, there are 153.2 rainfall days, and 268mm (10.55") of precipitation is accumulated.Snowfall
In Sønderborg, snow does not fall in May through October.Sea temperature
In September, the average sea temperature in Sønderborg is 15°C (59°F).Note: For most individuals, swimming in 15°C (59°F) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 21°C (69.8°F).
Daylight
In Sønderborg, the average length of the day in September is 12h and 43min.On the first day of September in Sønderborg, sunrise is at 06:28 and sunset at 20:12. On the last day of the month, sunrise is at 07:22 and sunset at 18:58 CEST.
Sunshine
In September, the average sunshine is 7.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the usual temperature for Sønderborg in September?
What is the average humidity in September in Sønderborg?
How many days does it rain in September in Sønderborg?
When it does not snow in Sønderborg?
What is the sea temperature in September in Sønderborg?
How many hours of daylight does Sønderborg have in September?
When is the sunrise / sunset in September in Sønderborg?
How many hours of sunshine does Sønderborg have in September?
What is the UV index reading in September in Sønderborg?
Average temperature in September
Sønderborg, Denmark
- Average high temperature in September: 17°C
The warmest month (with the highest average high temperature) is August (20.3°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in September: 12.7°C
The month with the highest average low temperature is August (15°C).
The coldest month (with the lowest average low temperature) is February (0.5°C).
Average pressure in September
Sønderborg, Denmark
- Average pressure in September: 1015.4mbar
The months with the highest atmospheric pressure are April and May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in September
Sønderborg, Denmark
- Average wind speed in September: 18.2km/h
The windiest month (with the highest average wind speed) is December (22.5km/h).
The calmest month (with the lowest average wind speed) is July (16.2km/h).
Average humidity in September
Sønderborg, Denmark
- Average humidity in September: 80%
The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are April, May and August (77%).
Average rainfall in September
Sønderborg, Denmark
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (32mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Sønderborg, Denmark
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in September
Sønderborg, Denmark
- Average snowfall in September: 0mm
The month with the highest snowfall is February (18mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Sønderborg, Denmark
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Sønderborg, Denmark
- Average sea temperature in September: 15°C
The best month for swimming (with the highest average sea temperature) is August (18°C).
The coldest month (with the lowest average sea temperature) is February (1°C).
Average daylight in September /
Average sunshine in September
Sønderborg, Denmark
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).
Average sunshine days in September
Sønderborg, Denmark
- Average sunshine days in September: 11 days
The month with the most sunshine days is April (17.1 days).
The month with the least sunshine days is December (9.9 days).
Average UV index in September
Sønderborg, 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
Sønderborg, Denmark
- Average cloud cover in September: 49
The months with the most cloud cover are February and December (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
Sønderborg, Denmark
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
Sønderborg, Denmark
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