September weather forecastValsta, Sweden
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Valsta, Sweden, with temperature in the range of an average high of 16.4°C (61.5°F) and an average low of 9.2°C (48.6°F).Temperature
Valsta observes a small decrease in the average high-temperature with the arrival of September, falling from August's agreeable 21.1°C (70°F) to an enjoyable 16.4°C (61.5°F). In the month of September, an average of 9.2°C (48.6°F) marks the low-temperature.Humidity
The average relative humidity in September is 79%.Rainfall
In Valsta, Sweden, in September, during 13 rainfall days, 29mm (1.14") of precipitation is typically accumulated. Throughout the year, there are 144.9 rainfall days, and 400mm (15.75") of precipitation is accumulated.Snowfall
In Valsta, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 50min.On the first day of September, sunrise is at 05:56 and sunset at 19:59. On the last day of the month, sunrise is at 07:01 and sunset at 18:33 CEST.
Sunshine
In September, the average sunshine is 7.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 during September leads to these advisories:
Exercise prevention - Protecting skin and eyes from harm is required. When the Sun is at its strongest around midday, find shade and limit exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valsta, Sweden
- Average high temperature in September: 16.4°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is January (-0.8°C).
- Average low temperature in September: 9.2°C
The month with the highest average low temperature is July (12.6°C).
The coldest months (with the lowest average low temperature) are January and February (-4.4°C).
Average pressure in September
Valsta, Sweden
- Average pressure in September: 1013.6mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1008.2mbar).
Average wind speed in September
Valsta, Sweden
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is December (13.7km/h).
The calmest month (with the lowest average wind speed) is August (11.1km/h).
Average humidity in September
Valsta, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and December (90%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Valsta, Sweden
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Valsta, Sweden
- Average rainfall days in September: 13 days
The months with the highest number of rainy days are July and August (16.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Valsta, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (121mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Valsta, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Valsta, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average sunshine days in September
Valsta, Sweden
- Average sunshine days in September: 13.9 days
The months with the most sunshine days are March and April (15.6 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in September
Valsta, Sweden
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Valsta, Sweden
- Average cloud cover in September: 48
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are June and August (Cloud cover 42).
Average visibility in September
Valsta, Sweden
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August and September (9km).
The months with the lowest visibility are January and February (7km).
