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
September's onset introduces a mild reduction in the average high-temperature, from an enjoyable 19°C (66.2°F) in August to a still refreshing 15.3°C (59.5°F). An average low-temperature of 11.2°C (52.2°F) is witnessed throughout the month of September in Lännåker, a mere drop from the daytime peak.Humidity
In Lännåker, the average relative humidity in September is 80%.Rainfall
In September, in Lännåker, Sweden, the rain falls for 8.6 days. Throughout September, 11mm (0.43") of precipitation is accumulated. Throughout the year, in Lännåker, Sweden, there are 88.9 rainfall days, and 116mm (4.57") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 50min.On the first day of September in Lännåker, sunrise is at 05:45 and sunset at 19:48. On the last day of the month, sunrise is at 06:50 and sunset at 18:22 CEST.
Sunshine
The average sunshine in September is 8.5h.UV index
In Lännåker, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Lännåker?
What is the average humidity in September in Lännåker?
How many days does it rain in September in Lännåker?
When it does not snow in Lännåker?
Does it snow in Lännåker in September?
How many hours of daylight does Lännåker have in September?
When are sunrise and sunset in September in Lännåker?
How many hours of sunshine does Lännåker have in September?
What is the UV index reading in September in Lännåker?
Average temperature in September
Lännåker, Sweden
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (19.5°C).
The month with the lowest average high temperature is February (0.3°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is August (14.4°C).
The coldest months (with the lowest average low temperature) are January and February (-2.3°C).
Average pressure in September
Lännåker, Sweden
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.9mbar).
Average wind speed in September
Lännåker, Sweden
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (23.5km/h).
The calmest month (with the lowest average wind speed) is July (15.3km/h).
Average humidity in September
Lännåker, Sweden
- Average humidity in September: 80%
The month with the highest relative humidity is November (86%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Lännåker, Sweden
- Average rainfall in September: 11mm
The wettest months (with the highest rainfall) are July and August (14mm).
The driest month (with the least rainfall) is April (4mm).
Average rainfall days in September
Lännåker, Sweden
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is August (10.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Lännåker, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Lännåker, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lännåker, Sweden
- Average daylight in September: 12h and 5min
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: 8h and 3min
The month with the most sunshine is June (Average sunshine: 12h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Lännåker, Sweden
- Average sunshine days in September: 17.7 days
The months with the most sunshine days are April and May (21.8 days).
The month with the least sunshine days is December (14.4 days).
Average UV index in September
Lännåker, 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 and February (UV index 1).
Average cloud cover in September
Lännåker, Sweden
- Average cloud cover in September: 40
The months with the most cloud cover are January and February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Lännåker, Sweden
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
Lännåker, Sweden
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