September weather forecastJäppilä, Finland
September
Weather in September
September, the first month of the autumn in Jäppilä, is still a refreshing month, with an average temperature varying between 13.7°C (56.7°F) and 8°C (46.4°F).Temperature
The shift from August to September involves a decrease in the average high-temperature, from an enjoyable 19.3°C (66.7°F) to a moderate 13.7°C (56.7°F). In the month of September, the temperature generally rests at an average low of 8°C (46.4°F).Humidity
In Jäppilä, Finland, the average relative humidity in September is 82%.Rainfall
In Jäppilä, in September, it is raining for 13.1 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, there are 107.2 rainfall days, and 393mm (15.47") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, there are 110.8 snowfall days, and 1072mm (42.2") of snow is accumulated.Daylight
The average length of the day in September is 12h and 57min.On the first day of the month, sunrise is at 05:59 and sunset at 20:20. On the last day of September, in Jäppilä, Finland, sunrise is at 07:16 and sunset at 18:43 EEST.
Sunshine
In September, the average sunshine is 6.3h.UV index
In Jäppilä, 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 the ordinary person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Stay sun-safe with clothing that is both closely woven and worn loosely. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Jäppilä, Finland
- Average high temperature in September: 13.7°C
The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 8°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-9.9°C).
Average pressure in September
Jäppilä, Finland
- Average pressure in September: 1012.5mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Jäppilä, Finland
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is November (15km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).
Average humidity in September
Jäppilä, Finland
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Jäppilä, Finland
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is July (48mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Jäppilä, Finland
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (13.7 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Jäppilä, Finland
- Average snowfall in September: 2mm
The month with the highest snowfall is January (230mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Jäppilä, Finland
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (23.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Jäppilä, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 12min).
- Average sunshine in September: 6h and 18min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 0h and 42min).
Average sunshine days in September
Jäppilä, Finland
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Jäppilä, 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
Jäppilä, Finland
- Average cloud cover in September: 57
The months with the most cloud cover are January and February (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Jäppilä, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (5km).
