September weather forecastYtterby, Sweden
September
Weather in September
September, the first month of the autumn in Ytterby, is also a moderate month, with temperature in the range of an average low of 10.6°C (51.1°F) and an average high of 15.4°C (59.7°F).Temperature
September is characterized by a mild reduction in the average high-temperature, from a comfortable 19.7°C (67.5°F) in August to a moderate 15.4°C (59.7°F). Nighttime temperatures hover around an average low of 10.6°C (51.1°F) in September, a slight descent from daytime highs.Humidity
The average relative humidity in September is 79%.Rainfall
In Ytterby, in September, during 9.6 rainfall days, 11mm (0.43") of precipitation is typically accumulated. In Ytterby, during the entire year, the rain falls for 98.4 days and collects up to 140mm (5.51") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Ytterby, the average length of the day in September is 12h and 50min.On the first day of September, sunrise is at 05:44 and sunset at 19:48. On the last day of the month, sunrise is at 06:50 and sunset at 18:22 CEST.
Sunshine
In September, the average sunshine in Ytterby is 8.3h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. 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
Ytterby, Sweden
- Average high temperature in September: 15.4°C
The warmest month (with the highest average high temperature) is July (19.8°C).
The month with the lowest average high temperature is January (0°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (-2.8°C).
Average pressure in September
Ytterby, 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 (1007.8mbar).
Average wind speed in September
Ytterby, Sweden
- Average wind speed in September: 16.7km/h
The windiest month (with the highest average wind speed) is December (21.8km/h).
The calmest month (with the lowest average wind speed) is July (14.2km/h).
Average humidity in September
Ytterby, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, November and December (86%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Ytterby, Sweden
- Average rainfall in September: 11mm
The wettest month (with the highest rainfall) is July (18mm).
The driest month (with the least rainfall) is April (5mm).
Average rainfall days in September
Ytterby, Sweden
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (11.1 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in September
Ytterby, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (32mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Ytterby, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ytterby, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is June (Average sunshine: 12h and 24min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Ytterby, Sweden
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is April (20.8 days).
The month with the least sunshine days is December (14.6 days).
Average UV index in September
Ytterby, 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
Ytterby, Sweden
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Ytterby, 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).
