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
The average high-temperature during September registers at a still refreshing 15.2°C (59.4°F), maintaining a close resemblance to the previous month. Lysekil upholds a consistent average temperature of 12.8°C (55°F) throughout the nights of September.Humidity
The average relative humidity in September is 78%.Rainfall
In Lysekil, during September, the rain falls for 16.5 days and regularly aggregates up to 53mm (2.09") of precipitation. Throughout the year, there are 173.9 rainfall days, and 551mm (21.69") of precipitation is accumulated.Snowfall
In Lysekil, snow does not fall in June through October.Sea temperature
In Lysekil, the average seawater temperature in September is 15.8°C (60.4°F).Note: Most people do not find swimming enjoyable in water of 15.8°C (60.4°F). The task of controlling breathing becomes tougher as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Lysekil, the average length of the day in September is 12h and 49min.On the first day of September in Lysekil, sunrise is at 06:14 and sunset at 20:13. On the last day of the month, sunrise is at 07:17 and sunset at 18:50 CEST.
Sunshine
In Lysekil, the average sunshine in September is 8.1h.UV index
In Lysekil, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 in September translates into these instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
What is the temperature in September in Lysekil?
What is the average humidity in September in Lysekil?
How many days does it rain in September in Lysekil?
When it does not snow in Lysekil?
What is the sea water temperature in September in Lysekil?
How many hours of daylight does Lysekil have in September?
What time are sunrise and sunset in September in Lysekil?
How many hours of sunshine does Lysekil have in September?
What is the UV index reading in September in Lysekil?
Average temperature in September
Lysekil, Sweden
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (18.2°C).
The month with the lowest average high temperature is February (1.8°C).
- Average low temperature in September: 12.8°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (-0.2°C).
Average pressure in September
Lysekil, Sweden
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is April (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).
Average wind speed in September
Lysekil, Sweden
- Average wind speed in September: 23.6km/h
The windiest month (with the highest average wind speed) is December (27.6km/h).
The calmest month (with the lowest average wind speed) is June (19.1km/h).
Average humidity in September
Lysekil, Sweden
- Average humidity in September: 78%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Lysekil, Sweden
- Average rainfall in September: 53mm
The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Lysekil, Sweden
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in September
Lysekil, Sweden
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (30mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Lysekil, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Lysekil, Sweden
- Average sea temperature in September: 15.8°C
The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is March (2.8°C).
Average daylight in September /
Average sunshine in September
Lysekil, 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: 8h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Lysekil, Sweden
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is April (16.9 days).
The months with the least sunshine days are November and December (10.3 days).
Average UV index in September
Lysekil, Sweden
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Lysekil, Sweden
- Average cloud cover in September: 44
The months with the most cloud cover are February and November (Cloud cover 62).
The months with the least cloud cover are June and July (Cloud cover 36).
Average visibility in September
Lysekil, Sweden
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, November and December (9km).
Lysekil, Sweden
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