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
September
Weather in September
Temperature
In September, the average high-temperature marginally drops from an enjoyable 16.8°C (62.2°F) in August to a cool 12.3°C (54.1°F). Rolfs sustains a near constant temperature throughout September, with nighttime averages of 7.9°C (46.2°F).Humidity
The average relative humidity in September in Rolfs is 81%.Rainfall
In Rolfs, during September, the rain falls for 13.8 days and regularly aggregates up to 44mm (1.73") of precipitation. Throughout the year, in Rolfs, Sweden, there are 117.7 rainfall days, and 437mm (17.2") of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Rolfs, Sweden. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Rolfs, there are 96.5 snowfall days, and 1080mm (42.52") of snow is accumulated.Sea temperature
In Rolfs, the average seawater temperature in September is 12.3°C (54.1°F).Note: Beware when you're in 12.3°C (54.1°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.
Daylight
The average length of the day in September is 13h and 6min.On the first day of the month, sunrise is at 05:05 and sunset at 19:49. On the last day of September, sunrise is at 06:36 and sunset at 17:58 CEST.
Sunshine
In Rolfs, Sweden, the average sunshine in September is 7.2h.UV index
In September, the average daily maximum UV index in Rolfs is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Act with care - The need to guard against sun damage is communicated. To guard against the harmful effects of the Sun, minimize exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Rolfs?
What is the average humidity in September in Rolfs?
How much does it rain in Rolfs in September?
When does it start to snow in Rolfs?
What is the sea water temperature in September in Rolfs?
What is the average length of the day in September in Rolfs?
When is the sunrise / sunset in September in Rolfs?
How long on average sun shines in September in Rolfs?
How high is the UV index in September in Rolfs?
Average temperature in September
Rolfs, Sweden
- Average high temperature in September: 12.3°C
The warmest month (with the highest average high temperature) is July (18.3°C).
The month with the lowest average high temperature is January (-6.3°C).
- Average low temperature in September: 7.9°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is February (-11.1°C).
Average pressure in September
Rolfs, Sweden
- Average pressure in September: 1010.9mbar
The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1004.8mbar).
Average wind speed in September
Rolfs, Sweden
- Average wind speed in September: 15km/h
The windiest month (with the highest average wind speed) is December (15.9km/h).
The calmest month (with the lowest average wind speed) is April (12.2km/h).
Average humidity in September
Rolfs, Sweden
- Average humidity in September: 81%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Rolfs, Sweden
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is December (51mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Rolfs, Sweden
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Rolfs, Sweden
- Average snowfall in September: 1mm
The month with the highest snowfall is March (231mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Rolfs, Sweden
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (17.9 days).
The months with the least snowfall days are July and August (0 days).
Average sea temperature in September
Rolfs, Sweden
- Average sea temperature in September: 12.3°C
The best month for swimming (with the highest average sea temperature) is July (16.8°C).
The coldest month (with the lowest average sea temperature) is February (-0.8°C).
Average daylight in September /
Average sunshine in September
Rolfs, Sweden
- Average daylight in September: 13h and 1min
The month with the longest days is July (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 3h and 18min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 18min).
Average sunshine days in September
Rolfs, Sweden
- Average sunshine days in September: 14 days
The months with the most sunshine days are June and August (16.3 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in September
Rolfs, 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, March and December (UV index 1).
Average cloud cover in September
Rolfs, Sweden
- Average cloud cover in September: 50
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Rolfs, Sweden
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March and April (7km).
