September weather forecastBillsta, Sweden
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Billsta, Sweden, with an average temperature ranging between max 13.5°C (56.3°F) and min 7.6°C (45.7°F).Temperature
Billsta's September weather shows a modest shift in high-temperatures, falling from August's comfortable 18°C (64.4°F) to a moderate 13.5°C (56.3°F). Throughout September, the temperature tends to fall to a consistent average low of 7.6°C (45.7°F).Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 27mm (1.06") of precipitation is accumulated. Throughout the year, there are 118.4 rainfall days, and 372mm (14.65") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Billsta, the average length of the day in September is 12h and 59min.On the first day of September, sunrise is at 05:32 and sunset at 19:58. On the last day of the month, sunrise is at 06:52 and sunset at 18:18 CEST.
Sunshine
In September, the average sunshine is 7.6h.UV index
In Billsta, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Billsta, Sweden
- Average high temperature in September: 13.5°C
The warmest month (with the highest average high temperature) is July (19.3°C).
The month with the lowest average high temperature is January (-3.5°C).
- Average low temperature in September: 7.6°C
The month with the highest average low temperature is July (11.7°C).
The coldest month (with the lowest average low temperature) is February (-7.5°C).
Average pressure in September
Billsta, Sweden
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1005.5mbar).
Average wind speed in September
Billsta, Sweden
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is December (15.1km/h).
The calmest month (with the lowest average wind speed) is August (11.4km/h).
Average humidity in September
Billsta, Sweden
- Average humidity in September: 80%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Billsta, Sweden
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Billsta, Sweden
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is August (15 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Billsta, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (191mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Billsta, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Billsta, Sweden
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 18min).
The month with the shortest days is December (Average daylight: 4h and 48min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is July (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average sunshine days in September
Billsta, Sweden
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is June (16.8 days).
The month with the least sunshine days is December (9.7 days).
Average UV index in September
Billsta, 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, November and December (UV index 1).
Average cloud cover in September
Billsta, Sweden
- Average cloud cover in September: 47
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Billsta, Sweden
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (7km).
