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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a comfortable 19.4°C (66.9°F) in August to a still refreshing 16°C (60.8°F). Throughout the nights in September, Billdal notes an average low of 11.1°C (52°F), a small dip from the daytime peak.Humidity
In September, the average relative humidity in Billdal is 80%.Rainfall
In Billdal, in September, during 16.1 rainfall days, 51mm (2.01") of precipitation is typically accumulated. Throughout the year, in Billdal, there are 179.3 rainfall days, and 570mm (22.44") of precipitation is accumulated.Snowfall
In Billdal, snow does not fall in June through September.Sea temperature
In September, the average sea temperature is 16.1°C (61°F).Note: Swimming in 16.1°C (61°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
Daylight
The average length of the day in September in Billdal is 12h and 47min.On the first day of September, sunrise is at 06:14 and sunset at 20:09. On the last day of the month, sunrise is at 07:15 and sunset at 18:48 CEST.
Sunshine
In September, the average sunshine is 7.6h.UV index
The average daily maximum UV index in September in Billdal 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 ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What is the temperature in September in Billdal?
What is the average humidity in September in Billdal?
How much does it rain in Billdal in September?
When it does not snow in Billdal?
Does it snow in Billdal in September?
What is the sea water temperature in September in Billdal?
What is the average length of the day in September in Billdal?
When are sunrise and sunset in September in Billdal?
How many hours of sunshine does Billdal have in September?
How high is the UV index in September in Billdal?
Average temperature in September
Billdal, Sweden
- Average high temperature in September: 16°C
The warmest month (with the highest average high temperature) is July (19.8°C).
The month with the lowest average high temperature is February (1.6°C).
- Average low temperature in September: 11.1°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-1.6°C).
Average pressure in September
Billdal, Sweden
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is April (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in September
Billdal, Sweden
- Average wind speed in September: 17km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is June (14.8km/h).
Average humidity in September
Billdal, Sweden
- Average humidity in September: 80%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
Billdal, Sweden
- Average rainfall in September: 51mm
The wettest month (with the highest rainfall) is August (68mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Billdal, Sweden
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is August (19 days).
The month with the least rainy days is February (9.7 days).
Average snowfall in September
Billdal, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (58mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Billdal, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Billdal, Sweden
- Average sea temperature in September: 16.1°C
The best month for swimming (with the highest average sea temperature) is August (18.5°C).
The coldest month (with the lowest average sea temperature) is March (2.6°C).
Average daylight in September /
Average sunshine in September
Billdal, Sweden
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 54min).
The month with the shortest days is December (Average daylight: 6h and 42min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in September
Billdal, Sweden
- Average sunshine days in September: 11 days
The month with the most sunshine days is April (15.3 days).
The month with the least sunshine days is August (9.5 days).
Average UV index in September
Billdal, Sweden
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Billdal, Sweden
- Average cloud cover in September: 48
The months with the most cloud cover are January, February, November and December (Cloud cover 64).
The month with the least cloud cover is June (Cloud cover 39).
Average visibility in September
Billdal, Sweden
- 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).
Billdal, Sweden
Weather forecast for your location
2. Allow the app to use your location
