September weather forecastSkellefteå, Sweden
September
Weather in September
September marks the beginning of autumn in Skellefteå, Sweden, evident by the tapering temperatures. From 18.2°C (64.8°F) in August, the average high temperature plummets to 13.3°C (55.9°F). The slow but steady decline in temperatures prepares the residents for the forthcoming colder months. Chilly mornings and evenings become a regular occurrence, reminding one of the proximity of winter. September is typically characterized by its shorter days, gradual cooling, and the first traces of autumn's vibrant hues.Temperature
In September, the average high-temperature marginally decreases from an enjoyable 18.2°C (64.8°F) in August to a still refreshing 13.3°C (55.9°F). During September, the average low-temperature is a chilly 7.4°C (45.3°F).Humidity
In September, the average relative humidity in Skellefteå, Sweden, is 79%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 20mm (0.79") of precipitation is accumulated. In Skellefteå, during the entire year, the rain falls for 99.9 days and collects up to 252mm (9.92") of precipitation.Snowfall
June through September are months without snowfall in Skellefteå.Daylight
The average length of the day in September is 13h and 3min.On the first day of the month, sunrise is at 05:18 and sunset at 19:53. On the last day of September, sunrise is at 06:44 and sunset at 18:07 CEST.
Sunshine
In Skellefteå, the average sunshine in September is 7.6h.UV index
In September, the average daily maximum UV index in Skellefteå is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 3 during September translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Skellefteå, Sweden
- Average high temperature in September: 13.3°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is January (-4.8°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is February (-9.3°C).
Average pressure in September
Skellefteå, Sweden
- Average pressure in September: 1011.2mbar
The month with the highest atmospheric pressure is May (1014.1mbar).
The month with the lowest atmospheric pressure is December (1005mbar).
Average wind speed in September
Skellefteå, Sweden
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is December (14.6km/h).
The calmest month (with the lowest average wind speed) is July (11.2km/h).
Average humidity in September
Skellefteå, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is June (65%).
Average rainfall in September
Skellefteå, Sweden
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is July (30mm).
The driest month (with the least rainfall) is February (14mm).
Average rainfall days in September
Skellefteå, Sweden
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (11.9 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Skellefteå, Sweden
- Average snowfall in September: 0mm
The months with the highest snowfall are January and March (107mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Skellefteå, Sweden
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Skellefteå, Sweden
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is July (Average sunshine: 12h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in September
Skellefteå, Sweden
- Average sunshine days in September: 17.1 days
The months with the most sunshine days are June and October (17.8 days).
The month with the least sunshine days is December (12.9 days).
Average UV index in September
Skellefteå, Sweden
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Skellefteå, Sweden
- Average cloud cover in September: 46
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Skellefteå, Sweden
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (7km).
