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
September
Weather in September
Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from an enjoyable 18.7°C (65.7°F) in August to a moderate 14°C (57.2°F). Throughout September, the nighttime temperature in Birsta averages to a chilly 7.3°C (45.1°F).Humidity
The average relative humidity in September is 79%.Rainfall
In Birsta, in September, it is raining for 11.7 days, with typically 32mm (1.26") of accumulated precipitation. Throughout the year, in Birsta, Sweden, there are 117.2 rainfall days, and 384mm (15.12") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 57min.On the first day of the month, sunrise is at 05:40 and sunset at 20:00. On the last day of September, sunrise is at 06:56 and sunset at 18:24 CEST.
Sunshine
The average sunshine in September is 7.6h.UV index
The average daily maximum UV index in September in Birsta is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 3 translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Birsta in September?
What is the average humidity in September in Birsta?
How much does it rain in Birsta in September?
When it does not snow in Birsta?
Does it snow in Birsta in September?
What is the average length of the day in September in Birsta?
What time are sunrise and sunset in September in Birsta?
How many hours of sunshine does Birsta have in September?
What is the UV index reading in September in Birsta?
Average temperature in September
Birsta, Sweden
- Average high temperature in September: 14°C
The warmest month (with the highest average high temperature) is July (20.3°C).
The month with the lowest average high temperature is January (-3°C).
- Average low temperature in September: 7.3°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is February (-6.9°C).
Average pressure in September
Birsta, Sweden
- Average pressure in September: 1011.9mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.9mbar).
Average wind speed in September
Birsta, Sweden
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is January (11.9km/h).
The calmest month (with the lowest average wind speed) is August (9.5km/h).
Average humidity in September
Birsta, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (66%).
Average rainfall in September
Birsta, Sweden
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Birsta, Sweden
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Birsta, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (217mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Birsta, Sweden
- Average snowfall days in September: 0 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, August and September (0 days).
Average daylight in September /
Average sunshine in September
Birsta, Sweden
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 12min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Birsta, Sweden
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is February (12.5 days).
Average UV index in September
Birsta, 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
Birsta, Sweden
- Average cloud cover in September: 49
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Birsta, Sweden
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August and October (9km).
The months with the lowest visibility are January, February and March (7km).
