September weather forecastRoknäs, Sweden
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Roknäs, Sweden, with temperature in the range of an average high of 13°C (55.4°F) and an average low of 7.3°C (45.1°F).Temperature
September's arrival comes with a decrease in the average high-temperature, moving from a comfortable 18.1°C (64.6°F) in August to a moderate 13°C (55.4°F). During September, Roknäs witnesses a consistent average low-temperature of 7.3°C (45.1°F).Humidity
The average relative humidity in September in Roknäs is 79%.Rainfall
In Roknäs, in September, during 10.5 rainfall days, 24mm (0.94") of precipitation is typically accumulated. Throughout the year, there are 93.1 rainfall days, and 277mm (10.91") of precipitation is accumulated.Snowfall
In Roknäs, snow does not fall in June through September.Daylight
In September, the average length of the day in Roknäs, Sweden, is 13h and 5min.On the first day of September in Roknäs, sunrise is at 05:14 and sunset at 19:55. On the last day of the month, sunrise is at 06:43 and sunset at 18:06 CEST.
Sunshine
The average sunshine in September in Roknäs is 7.7h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roknäs, Sweden
- Average high temperature in September: 13°C
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 7.3°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is February (-10.7°C).
Average pressure in September
Roknäs, Sweden
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is May (1014.1mbar).
The month with the lowest atmospheric pressure is December (1004.9mbar).
Average wind speed in September
Roknäs, Sweden
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is December (14.1km/h).
The calmest month (with the lowest average wind speed) is July (11.2km/h).
Average humidity in September
Roknäs, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is June (66%).
Average rainfall in September
Roknäs, Sweden
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (28mm).
The driest month (with the least rainfall) is February (18mm).
Average rainfall days in September
Roknäs, Sweden
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is August (11.3 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in September
Roknäs, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (156mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Roknäs, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Roknäs, Sweden
- Average daylight in September: 13h and 6min
The month with the longest days is June (Average daylight: 22h and 6min).
The month with the shortest days is December (Average daylight: 3h and 42min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in September
Roknäs, Sweden
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is June (20.1 days).
The month with the least sunshine days is December (14.5 days).
Average UV index in September
Roknäs, Sweden
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Roknäs, Sweden
- Average cloud cover in September: 46
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in September
Roknäs, Sweden
- Average visibility in September: 9km
The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February, March and April (7km).
