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 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
The start of September comes with a small reduction in the average high-temperature, subtly receding from a pleasant 20.3°C (68.5°F) in August to a refreshing 16.6°C (61.9°F). A steady low-temperature average of 13°C (55.4°F) is logged during September, reflecting a modest dip from daytime readings.Humidity
In September, the average relative humidity is 79%.Rainfall
In Frederikssund, in September, it is raining for 16 days, with typically 44mm (1.73") of accumulated precipitation. In Frederikssund, during the entire year, the rain falls for 177.1 days and collects up to 475mm (18.7") of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 44min.On the first day of the month, sunrise is at 06:17 and sunset at 20:05. On the last day of September, sunrise is at 07:13 and sunset at 18:49 CEST.
Sunshine
In September, the average sunshine is 7.8h.UV index
The average daily maximum UV index in September in Frederikssund is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are the temperatures in Frederikssund in September?
What is the average humidity in September in Frederikssund?
How much does it rain in Frederikssund in September?
When it does not snow in Frederikssund?
How many hours of daylight does Frederikssund have in September?
When are sunrise and sunset in September in Frederikssund?
How long on average sun shines in September in Frederikssund?
What is the UV index reading in September in Frederikssund?
Average temperature in September
Frederikssund, Denmark
- Average high temperature in September: 16.6°C
The warmest months (with the highest average high temperature) are July and August (20.3°C).
The month with the lowest average high temperature is February (2.7°C).
- Average low temperature in September: 13°C
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is February (-0.2°C).
Average pressure in September
Frederikssund, Denmark
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is April (1015.5mbar).
The month with the lowest atmospheric pressure is December (1011mbar).
Average wind speed in September
Frederikssund, Denmark
- Average wind speed in September: 17.9km/h
The windiest month (with the highest average wind speed) is December (21.2km/h).
The calmest month (with the lowest average wind speed) is July (14.9km/h).
Average humidity in September
Frederikssund, Denmark
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, November and December (86%).
The months with the lowest relative humidity are April, May and June (75%).
Average rainfall in September
Frederikssund, Denmark
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is August (61mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Frederikssund, Denmark
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in September
Frederikssund, Denmark
- Average snowfall in September: 0mm
The month with the highest snowfall is January (55mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Frederikssund, Denmark
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Frederikssund, Denmark
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in September: 7h and 5min
The months with the most sunshine are June and August (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Frederikssund, Denmark
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is April (16.5 days).
The month with the least sunshine days is December (6.6 days).
Average UV index in September
Frederikssund, Denmark
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Frederikssund, Denmark
- Average cloud cover in September: 46
The month with the most cloud cover is December (Cloud cover 69).
The months with the least cloud cover are June and August (Cloud cover 38).
Average visibility in September
Frederikssund, 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).
Frederikssund, Denmark
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