September weather forecastJormua, Finland
September
Weather in September
The first month of the autumn, September, is still a cool month in Jormua, Finland, with an average temperature varying between 6.4°C (43.5°F) and 12.6°C (54.7°F).Temperature
In the transition to September, Jormua observes a drop in the average high-temperature, moving from a refreshing 18.2°C (64.8°F) in August to a cool 12.6°C (54.7°F). Throughout September, the nighttime temperature averages to a chilly 6.4°C (43.5°F).Humidity
In September, the average relative humidity in Jormua is 85%.Rainfall
In Jormua, during September, the rain falls for 16 days and regularly aggregates up to 41mm (1.61") of precipitation. Throughout the year, there are 124.6 rainfall days, and 374mm (14.72") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Jormua. September is the first month it typically snows. Throughout September, in the average 0.6 snowfall days, it receives 8mm (0.31") of snow. In Jormua, Finland, during the entire year, snow falls for 126.3 days and aggregates up to 903mm (35.55") of snow.Daylight
In Jormua, the average length of the day in September is 13h and 2min.On the first day of the month, sunrise is at 05:51 and sunset at 20:24. On the last day of September, in Jormua, Finland, sunrise is at 07:15 and sunset at 18:40 EEST.
Sunshine
The average sunshine in September is 5.8h.UV index
In September, the average daily maximum UV index in Jormua is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during September leads to these advisories:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Jormua, Finland
- Average high temperature in September: 12.6°C
The warmest month (with the highest average high temperature) is July (20.5°C).
The month with the lowest average high temperature is January (-7.3°C).
- Average low temperature in September: 6.4°C
The month with the highest average low temperature is July (11.6°C).
The coldest month (with the lowest average low temperature) is January (-11.6°C).
Average pressure in September
Jormua, Finland
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1006.7mbar).
Average wind speed in September
Jormua, Finland
- Average wind speed in September: 12.2km/h
The windiest months (with the highest average wind speed) are November and December (13.1km/h).
The calmest month (with the lowest average wind speed) is July (10km/h).
Average humidity in September
Jormua, Finland
- Average humidity in September: 85%
The months with the highest relative humidity are January and February (96%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Jormua, Finland
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is July (48mm).
The driest months (with the least rainfall) are February and April (21mm).
Average rainfall days in September
Jormua, Finland
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Jormua, Finland
- Average snowfall in September: 8mm
The month with the highest snowfall is March (160mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Jormua, Finland
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is December (23.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Jormua, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 4h and 18min).
- Average sunshine in September: 5h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 0h and 36min).
Average sunshine days in September
Jormua, Finland
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is April (7.6 days).
Average UV index in September
Jormua, Finland
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Jormua, Finland
- Average cloud cover in September: 63
The months with the most cloud cover are January, February and December (Cloud cover 84).
The month with the least cloud cover is July (Cloud cover 46).
Average visibility in September
Jormua, 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).
