September weather forecastKoskenpää, Finland
September
Weather in September
The first month of the autumn, September, is still a mild month in Koskenpää, Finland, with temperature in the range of an average low of 7.5°C (45.5°F) and an average high of 13.9°C (57°F).Temperature
The onset of September comes with a shift in the average high-temperature, falling from 19.8°C (67.6°F) in August to a still refreshing 13.9°C (57°F). The month of September records an average low-temperature of 7.5°C (45.5°F).Humidity
In September, the average relative humidity in Koskenpää is 83%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 30mm (1.18") of precipitation is accumulated. In Koskenpää, during the entire year, the rain falls for 125.3 days and collects up to 390mm (15.35") of precipitation.Snowfall
January through June, September through December are months with snowfall in Koskenpää. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, there are 99.7 snowfall days, and 915mm (36.02") of snow is accumulated.Daylight
The average length of the day in September in Koskenpää is 12h and 56min.On the first day of the month, sunrise is at 06:10 and sunset at 20:28. On the last day of September, in Koskenpää, sunrise is at 07:25 and sunset at 18:53 EEST.
Sunshine
The average sunshine in September is 6.6h.UV index
In Koskenpää, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koskenpää, Finland
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-4.9°C).
- Average low temperature in September: 7.5°C
The month with the highest average low temperature is July (12.3°C).
The coldest month (with the lowest average low temperature) is January (-9.2°C).
Average pressure in September
Koskenpää, Finland
- Average pressure in September: 1013mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in September
Koskenpää, Finland
- Average wind speed in September: 11.2km/h
The windiest month (with the highest average wind speed) is December (13.1km/h).
The calmest month (with the lowest average wind speed) is July (9.9km/h).
Average humidity in September
Koskenpää, Finland
- Average humidity in September: 83%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (67%).
Average rainfall in September
Koskenpää, Finland
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Koskenpää, Finland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in September
Koskenpää, Finland
- Average snowfall in September: 1mm
The month with the highest snowfall is December (202mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Koskenpää, Finland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Koskenpää, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 36min).
The month with the shortest days is December (Average daylight: 5h and 18min).
- Average sunshine in September: 6h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average sunshine days in September
Koskenpää, Finland
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is May (17.5 days).
The month with the least sunshine days is December (8.4 days).
Average UV index in September
Koskenpää, Finland
- 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, February, March, November and December (UV index 1).
Average cloud cover in September
Koskenpää, Finland
- Average cloud cover in September: 56
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is August (Cloud cover 43).
Average visibility in September
Koskenpää, Finland
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (5km).
