September weather forecastPertunmaa, Finland
September
Weather in September
The first month of the autumn, September, is still a mild month in Pertunmaa, Finland, with an average temperature fluctuating between 14.3°C (57.7°F) and 8°C (46.4°F).Temperature
With the onset of September, Pertunmaa experiences a modest temperature adjustment, with the average high-temperature receding from a pleasant 20.4°C (68.7°F) in August to a refreshing 14.3°C (57.7°F). During the month of September, Pertunmaa anticipates a mean low-temperature of 8°C (46.4°F).Humidity
In September, the average relative humidity is 82%.Rainfall
In Pertunmaa, in September, it is raining for 14.5 days, with typically 38mm (1.5") of accumulated precipitation. Throughout the year, in Pertunmaa, there are 125.3 rainfall days, and 411mm (16.18") of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. In Pertunmaa, during the entire year, snow falls for 114.6 days and aggregates up to 1087mm (42.8") of snow.Daylight
In Pertunmaa, the average length of the day in September is 12h and 55min.On the first day of the month, sunrise is at 06:06 and sunset at 20:21. On the last day of September, sunrise is at 07:19 and sunset at 18:48 EEST.
Sunshine
In Pertunmaa, the average sunshine in September is 6.6h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pertunmaa, Finland
- Average high temperature in September: 14.3°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (-5.3°C).
- Average low temperature in September: 8°C
The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-9.2°C).
Average pressure in September
Pertunmaa, Finland
- Average pressure in September: 1013mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.5mbar).
Average wind speed in September
Pertunmaa, Finland
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is December (12.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.1km/h).
Average humidity in September
Pertunmaa, 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 May (66%).
Average rainfall in September
Pertunmaa, Finland
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is July (44mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Pertunmaa, Finland
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Pertunmaa, Finland
- Average snowfall in September: 1mm
The month with the highest snowfall is December (236mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Pertunmaa, Finland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (24.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Pertunmaa, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 6h and 36min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 0h and 42min).
Average sunshine days in September
Pertunmaa, Finland
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is May (16 days).
The month with the least sunshine days is December (6.5 days).
Average UV index in September
Pertunmaa, Finland
- Average UV index in September: 3
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, November and December (UV index 1).
Average cloud cover in September
Pertunmaa, Finland
- Average cloud cover in September: 56
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
Pertunmaa, 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).
