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 arrival of September in Trollhättan corresponds with a minor reduction in the average high-temperature, down from August's enjoyable 19.7°C (67.5°F) to a moderate 15.9°C (60.6°F). Throughout September, Trollhättan witnesses a consistent average low-temperature of 9.7°C (49.5°F).Humidity
The average relative humidity in September in Trollhättan is 80%.Rainfall
In Trollhättan, Sweden, during September, the rain falls for 14.8 days and regularly aggregates up to 37mm (1.46") of precipitation. Throughout the year, in Trollhättan, there are 170 rainfall days, and 502mm (19.76") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Trollhättan, Sweden, the average length of the day in September is 12h and 49min.On the first day of September, sunrise is at 06:11 and sunset at 20:10. On the last day of the month, sunrise is at 07:14 and sunset at 18:47 CEST.
Sunshine
The average sunshine in September is 7.7h.UV index
In Trollhättan, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a regular UV index of 4 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What are the temperatures in Trollhättan in September?
What is the average humidity in September in Trollhättan?
How many days does it rain in September in Trollhättan?
When it does not snow in Trollhättan?
Does it snow in Trollhättan in September?
What is the average length of the day in September in Trollhättan?
What time are sunrise and sunset in September in Trollhättan?
How many hours of sunshine does Trollhättan have in September?
What is the UV index reading in September in Trollhättan?
Average temperature in September
Trollhättan, Sweden
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is July (20.8°C).
The month with the lowest average high temperature is January (0.6°C).
- Average low temperature in September: 9.7°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 (-2.9°C).
Average pressure in September
Trollhättan, Sweden
- Average pressure in September: 1013.5mbar
The months with the highest atmospheric pressure are April and May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).
Average wind speed in September
Trollhättan, Sweden
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is December (14.9km/h).
The calmest months (with the lowest average wind speed) are June and July (12km/h).
Average humidity in September
Trollhättan, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Trollhättan, Sweden
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is August (55mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Trollhättan, Sweden
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Trollhättan, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (80mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Trollhättan, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Trollhättan, Sweden
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Trollhättan, Sweden
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is April (15.6 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in September
Trollhättan, Sweden
- Average UV index in September: 4
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
Trollhättan, Sweden
- Average cloud cover in September: 47
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 41).
Average visibility in September
Trollhättan, Sweden
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February, March, November and December (8km).
Trollhättan, Sweden
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