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 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
Weather in September
Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a pleasant 20.7°C (69.3°F) to a comfortable 16.1°C (61°F). During September, Rosersberg consistently records a temperature low averaging a chilly 9.5°C (49.1°F).Humidity
The average relative humidity in September in Rosersberg is 80%.Rainfall
In Rosersberg, Sweden, in September, it is raining for 12.9 days, with typically 24mm (0.94") of accumulated precipitation. Throughout the year, in Rosersberg, there are 137.4 rainfall days, and 358mm (14.09") of precipitation is accumulated.Snowfall
In Rosersberg, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 51min.On the first day of the month, sunrise is at 05:45 and sunset at 19:50. On the last day of September, sunrise is at 06:52 and sunset at 18:23 CEST.
Sunshine
The average sunshine in September in Rosersberg, Sweden, is 8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Rosersberg?
What is the average humidity in September in Rosersberg?
How many days does it rain in September in Rosersberg?
When it does not snow in Rosersberg?
Does it snow in Rosersberg in September?
How many hours of daylight does Rosersberg have in September?
When is the sunrise / sunset in September in Rosersberg?
How many hours of sunshine does Rosersberg have in September?
What is the UV index reading in September in Rosersberg?
Average temperature in September
Rosersberg, Sweden
- Average high temperature in September: 16.1°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-0.7°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is July (13°C).
The coldest months (with the lowest average low temperature) are January and February (-4.2°C).
Average pressure in September
Rosersberg, Sweden
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1007.7mbar).
Average wind speed in September
Rosersberg, Sweden
- Average wind speed in September: 13.2km/h
The windiest month (with the highest average wind speed) is December (17.2km/h).
The calmest months (with the lowest average wind speed) are July and August (11.9km/h).
Average humidity in September
Rosersberg, Sweden
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Rosersberg, Sweden
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (50mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Rosersberg, Sweden
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in September
Rosersberg, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (106mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Rosersberg, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (13.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rosersberg, Sweden
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 12min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in September
Rosersberg, Sweden
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is February (11.1 days).
Average UV index in September
Rosersberg, 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 and February (UV index 1).
Average cloud cover in September
Rosersberg, Sweden
- Average cloud cover in September: 45
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Rosersberg, Sweden
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February and March (8km).
Rosersberg, Sweden
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