September weather forecastUtö, Finland
September
Weather in September
The first month of the autumn, September, is still a mild month in Utö, Finland, with an average temperature varying between 12.9°C (55.2°F) and 14.9°C (58.8°F).Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from an enjoyable 18.1°C (64.6°F) in August to a moderate 14.9°C (58.8°F). A consistent average low of 12.9°C (55.2°F) is noted in Utö throughout September, only a small step down from its daytime high.Humidity
The months with the lowest humidity in Utö are August through October, with an average relative humidity of 78%.Rainfall
September is the month with the most rainfall. Rain falls for 14.9 days and accumulates 40mm (1.57") of precipitation.Snowfall
In Utö, snow does not fall in June through September.Daylight
The average length of the day in September in Utö is 12h and 52min.On the first day of September, sunrise is at 06:31 and sunset at 20:37. On the last day of the month, sunrise is at 07:38 and sunset at 19:09 EEST.
Sunshine
In Utö, Finland, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September in Utö is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Utö, Finland
- Average high temperature in September: 14.9°C
The warmest month (with the highest average high temperature) is August (18.1°C).
The month with the lowest average high temperature is February (0.3°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (-1.7°C).
Average pressure in September
Utö, Finland
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is May (1015mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in September
Utö, Finland
- Average wind speed in September: 26.7km/h
The windiest month (with the highest average wind speed) is December (34.1km/h).
The calmest month (with the lowest average wind speed) is July (21.2km/h).
Average humidity in September
Utö, Finland
- Average humidity in September: 78%
The months with the highest relative humidity are February and March (84%).
The months with the lowest relative humidity are August, September and October (78%).
Average rainfall in September
Utö, Finland
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is September (40mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Utö, Finland
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is September (14.9 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Utö, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (41mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Utö, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Utö, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 1h and 54min).
Average sunshine days in September
Utö, Finland
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is December (9 days).
Average UV index in September
Utö, Finland
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March and December (UV index 1).
Average cloud cover in September
Utö, Finland
- Average cloud cover in September: 42
The months with the most cloud cover are January and December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Utö, Finland
- 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).
