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
Styrsö's average high-temperature in September sits at a mild 15.8°C (60.4°F), showing little difference from the previous month. Styrsö's nighttime temperatures in September settle close to daytime highs at an average of 12.7°C (54.9°F).Humidity
The average relative humidity in September in Styrsö is 78%.Rainfall
In September, in Styrsö, the rain falls for 11.2 days. Throughout September, 16mm (0.63") of precipitation is accumulated. In Styrsö, during the entire year, the rain falls for 123.7 days and collects up to 186mm (7.32") of precipitation.Snowfall
April through October are months without snowfall in Styrsö, Sweden.Sea temperature
In Styrsö, the average seawater temperature in September is 16.1°C (61°F).Note: For most individuals, swimming in 16.1°C (61°F) is not enjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing control becomes increasingly difficult.
Daylight
In September, the average length of the day in Styrsö is 12h and 47min.On the first day of September in Styrsö, sunrise is at 06:14 and sunset at 20:10. On the last day of the month, sunrise is at 07:15 and sunset at 18:49 CEST.
Sunshine
The average sunshine in September is 8.1h.UV index
In Styrsö, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Experience reduced UV exposure by about half when donning a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Styrsö in September?
What is the average humidity in September in Styrsö?
How many days does it rain in September in Styrsö?
When it does not snow in Styrsö?
What is the sea temperature in September in Styrsö?
How many hours of daylight does Styrsö have in September?
When are sunrise and sunset in September in Styrsö?
How long on average sun shines in September in Styrsö?
What is the UV index intensity in September in Styrsö?
Average temperature in September
Styrsö, Sweden
- Average high temperature in September: 15.8°C
The warmest month (with the highest average high temperature) is July (18.5°C).
The month with the lowest average high temperature is February (1.8°C).
- Average low temperature in September: 12.7°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (-0.3°C).
Average pressure in September
Styrsö, Sweden
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is April (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.8mbar).
Average wind speed in September
Styrsö, Sweden
- Average wind speed in September: 22.6km/h
The windiest month (with the highest average wind speed) is December (27km/h).
The calmest month (with the lowest average wind speed) is June (18.4km/h).
Average humidity in September
Styrsö, Sweden
- Average humidity in September: 78%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Styrsö, Sweden
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is August (21mm).
The driest month (with the least rainfall) is April (8mm).
Average rainfall days in September
Styrsö, Sweden
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is August (13.6 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in September
Styrsö, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (12mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Styrsö, Sweden
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average sea temperature in September
Styrsö, 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
Styrsö, 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: 8h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The months with the least sunshine are January, February and November (Average sunshine: 3h and 42min).
Average sunshine days in September
Styrsö, Sweden
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is March (19.8 days).
The month with the least sunshine days is August (13.3 days).
Average UV index in September
Styrsö, Sweden
- Average UV index in September: 4
The month with the highest UV index is 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
Styrsö, Sweden
- Average cloud cover in September: 45
The months with the most cloud cover are February and November (Cloud cover 62).
The month with the least cloud cover is June (Cloud cover 36).
Average visibility in September
Styrsö, Sweden
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Styrsö, Sweden
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