September weather forecastNyköping, Sweden
September
Weather in September
The first month of the autumn, September, is still a mild month in Nyköping, Sweden, with an average temperature ranging between min 10.5°C (50.9°F) and max 15.8°C (60.4°F).Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a pleasant 20°C (68°F) in August to a moderate 15.8°C (60.4°F). During the month of September, Nyköping's nighttime temperature lowers to an average of 10.5°C (50.9°F).Humidity
In September, the average relative humidity in Nyköping is 79%.Rainfall
In Nyköping, in September, during 11.1 rainfall days, 28mm (1.1") of precipitation is typically accumulated. Throughout the year, in Nyköping, there are 144.2 rainfall days, and 380mm (14.96") of precipitation is accumulated.Snowfall
In Nyköping, snow does not fall in June through September.Sea temperature
In Nyköping, in September, the average water temperature is 15°C (59°F).Note: The majority of people do not enjoy swimming in 15°C (59°F). The difficulty in controlling breathing escalates as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Nyköping is 12h and 49min.On the first day of the month, sunrise is at 05:51 and sunset at 19:52. On the last day of September, sunrise is at 06:55 and sunset at 18:27 CEST.
Sunshine
In Nyköping, the average sunshine in September is 8.4h.UV index
In Nyköping, Sweden, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nyköping, Sweden
- Average high temperature in September: 15.8°C
The warmest month (with the highest average high temperature) is July (20.6°C).
The month with the lowest average high temperature is January (0.3°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is January (-3°C).
Average pressure in September
Nyköping, Sweden
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).
Average wind speed in September
Nyköping, Sweden
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is December (18.8km/h).
The calmest month (with the lowest average wind speed) is July (13.4km/h).
Average humidity in September
Nyköping, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, November and December (87%).
The months with the lowest relative humidity are May and June (73%).
Average rainfall in September
Nyköping, Sweden
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Nyköping, Sweden
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
Nyköping, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (66mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Nyköping, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Nyköping, Sweden
- Average sea temperature in September: 15°C
The best month for swimming (with the highest average sea temperature) is August (18.8°C).
The coldest month (with the lowest average sea temperature) is February (1.2°C).
Average daylight in September /
Average sunshine in September
Nyköping, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 18min).
The month with the shortest days is December (Average daylight: 6h and 24min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is June (Average sunshine: 12h and 24min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Nyköping, Sweden
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is April (15.2 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in September
Nyköping, Sweden
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Nyköping, Sweden
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 66).
The months with the least cloud cover are June and August (Cloud cover 37).
Average visibility in September
Nyköping, Sweden
- Average visibility in September: 10km
The months with the highest visibility are April, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, May, October, November and December (9km).
