September weather forecastDonsö, Sweden
September
Weather in September
September, the first month of the autumn in Donsö, is also an enjoyable month, with an average temperature ranging between min 11.1°C (52°F) and max 16°C (60.8°F).Temperature
September is characterized by a mild reduction in the average high-temperature, from a comfortable 19.4°C (66.9°F) in August to a still enjoyable 16°C (60.8°F). Donsö's September nights witness minimal differential from the daytime temperatures, with averages of 11.1°C (52°F).Humidity
The average relative humidity in September is 80%.Rainfall
In Donsö, in September, it is raining for 16.1 days, with typically 51mm (2.01") of accumulated precipitation. Throughout the year, there are 179.3 rainfall days, and 570mm (22.44") of precipitation is accumulated.Snowfall
In Donsö, snow does not fall in June through September.Sea temperature
In Donsö, in September, the average water temperature is 16.1°C (61°F).Note: Swimming in water with a temperature of 16.1°C (61°F) is not a pleasurable experience for the majority. As the temperature falls below 21°C (69.8°F), it becomes increasingly hard to control one's breathing.
Daylight
The average length of the day in September in Donsö is 12h and 47min.On the first day of September, 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
In September, the average sunshine is 7.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Exercise prevention - Protecting skin and eyes from harm is required. Around midday, solar radiation is most harmful; hence, exposure should be limited. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, Sweden
- Average daylight in September: 12h and 48min
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 36min
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
Donsö, 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
Donsö, 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
Donsö, 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
Donsö, 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).
