September weather forecastKökar, Finland
September
Weather in September
The first month of the autumn, September, is also a moderate month in Kökar, Finland, with an average temperature ranging between min 13.2°C (55.8°F) and max 14.9°C (58.8°F).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's enjoyable 18.1°C (64.6°F) to a moderate 14.9°C (58.8°F). A consistent nighttime average temperature of 13.2°C (55.8°F) is maintained during September.Humidity
The months with the lowest humidity are August through October, with an average relative humidity of 78%.Rainfall
September is the month with the most rainfall. Rain falls for 14.2 days and accumulates 38mm (1.5") of precipitation.Snowfall
In Kökar, snow does not fall in June through September.Daylight
In Kökar, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 06:32 and sunset at 20:39. On the last day of September, in Kökar, sunrise is at 07:40 and sunset at 19:11 EEST.
Sunshine
In September, the average sunshine in Kökar is 8.1h.UV index
The average daily maximum UV index in September in Kökar is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kökar, 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: 13.2°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
Kökar, Finland
- Average pressure in September: 1013.3mbar
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
Kökar, Finland
- Average wind speed in September: 26.4km/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
Kökar, 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
Kökar, Finland
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is September (38mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Kökar, Finland
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Kökar, 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
Kökar, 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
Kökar, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Kökar, Finland
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is December (8.9 days).
Average UV index in September
Kökar, 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
Kökar, Finland
- Average cloud cover in September: 41
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
Kökar, 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).
