September weather forecastLilleby, Sweden
September
Weather in September
September, the first month of the autumn in Lilleby, is still a refreshing month, with an average temperature ranging between max 15.9°C (60.6°F) and min 11.3°C (52.3°F).Temperature
Lilleby, Sweden, in September undergoes a slight reduction in the average high-temperature, shifting from August's comfortable 19°C (66.2°F) to a still refreshing 15.9°C (60.6°F). Maintaining close parity with daytime warmth, the average nocturnal temperature during September stays at a cool 11.3°C (52.3°F).Humidity
In Lilleby, the average relative humidity in September is 79%.Rainfall
In Lilleby, in September, it is raining for 16.7 days, with typically 52mm (2.05") of accumulated precipitation. In Lilleby, during the entire year, the rain falls for 174 days and collects up to 572mm (22.52") of precipitation.Snowfall
Months with snowfall in Lilleby are January through May, September through December. September is the first month it typically snows in Lilleby. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Lilleby, there are 29.8 snowfall days, and 211mm (8.31") of snow is accumulated.Daylight
The average length of the day in September is 12h and 47min.On the first day of September, sunrise is at 06:14 and sunset at 20:10. On the last day of the month, sunrise is at 07:15 and sunset at 18:49 CEST.
Sunshine
The average sunshine in September is 7.7h.UV index
In Lilleby, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Enhance your sun protection with tightly woven, yet airy clothing. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lilleby, Sweden
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is February (1.6°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (-1.3°C).
Average pressure in September
Lilleby, Sweden
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is April (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.8mbar).
Average wind speed in September
Lilleby, Sweden
- Average wind speed in September: 18km/h
The windiest month (with the highest average wind speed) is December (21.2km/h).
The calmest month (with the lowest average wind speed) is June (15.3km/h).
Average humidity in September
Lilleby, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
Lilleby, Sweden
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is August (69mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Lilleby, Sweden
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is February (8.7 days).
Average snowfall in September
Lilleby, Sweden
- Average snowfall in September: 1mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Lilleby, Sweden
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lilleby, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 0min).
The month with the shortest days is December (Average daylight: 6h and 42min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in September
Lilleby, Sweden
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is April (15.8 days).
The month with the least sunshine days is August (9 days).
Average UV index in September
Lilleby, 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, October, November and December (UV index 2).
Average cloud cover in September
Lilleby, Sweden
- Average cloud cover in September: 47
The months with the most cloud cover are January, February, November and December (Cloud cover 63).
The months with the least cloud cover are June and July (Cloud cover 38).
Average visibility in September
Lilleby, Sweden
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).
