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 sea temperature 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
A subtle shift in Trosa's weather is observed as August turns into September, with the average high temperature reducing from a pleasant 21.1°C (70°F) to an enjoyable 16.5°C (61.7°F). Throughout September, the average low-temperature dips to a chilly 9.3°C (48.7°F).Humidity
In Trosa, the average relative humidity in September is 79%.Rainfall
In Trosa, during September, the rain falls for 12.5 days and regularly aggregates up to 28mm (1.1") of precipitation. In Trosa, during the entire year, the rain falls for 143.7 days and collects up to 387mm (15.24") of precipitation.Snowfall
In Trosa, snow does not fall in June through September.Sea temperature
In Trosa, in September, the average water temperature is 14.8°C (58.6°F).Note: Swimming in 14.8°C (58.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
In Trosa, the average length of the day in September is 12h and 50min.On the first day of September in Trosa, sunrise is at 05:48 and sunset at 19:50. On the last day of the month, sunrise is at 06:53 and sunset at 18:25 CEST.
Sunshine
In Trosa, the average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Trosa is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What is the average September temperature in Trosa?
What is the average humidity in September in Trosa?
How much does it rain in Trosa in September?
When it does not snow in Trosa?
Does it snow in Trosa in September?
How cold is the water in September in Trosa?
What is the average length of the day in September in Trosa?
When is the sunrise / sunset in September in Trosa?
How long on average sun shines in September in Trosa?
How high is the UV index in September in Trosa?
Average temperature in September
Trosa, Sweden
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (22.1°C).
The month with the lowest average high temperature is January (-0.6°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is July (12.8°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).
Average pressure in September
Trosa, Sweden
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.1mbar).
Average wind speed in September
Trosa, Sweden
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is December (16km/h).
The calmest month (with the lowest average wind speed) is August (11.5km/h).
Average humidity in September
Trosa, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Trosa, Sweden
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is October (41mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Trosa, Sweden
- Average rainfall days in September: 12.5 days
The months with the highest number of rainy days are July and August (14.6 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Trosa, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (110mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Trosa, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Trosa, Sweden
- Average sea temperature in September: 14.8°C
The best month for swimming (with the highest average sea temperature) is August (18.7°C).
The coldest month (with the lowest average sea temperature) is February (1°C).
Average daylight in September /
Average sunshine in September
Trosa, Sweden
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 18min).
The month with the shortest days is December (Average daylight: 6h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Trosa, Sweden
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is April (14.6 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in September
Trosa, 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
Trosa, Sweden
- Average cloud cover in September: 44
The months with the most cloud cover are February and December (Cloud cover 67).
The months with the least cloud cover are June, July and August (Cloud cover 40).
Average visibility in September
Trosa, 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).
Trosa, Sweden
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