Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a comfortable 18°C (64.4°F) to a moderate 13°C (55.4°F). Throughout September, the temperature falls to an average low of 7.7°C (45.9°F).Humidity
In September, the average relative humidity in Lumijoki is 82%.Rainfall
The months with the least rainfall are April and September Rain falls for 12.5 days and accumulates 25mm (0.98") of rain.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Lumijoki. Throughout September, in the average 0.2 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, in Lumijoki, there are 107.1 snowfall days, and 1131mm (44.53") of snow is accumulated.Daylight
In Lumijoki, the average length of the day in September is 13h and 3min.On the first day of September in Lumijoki, sunrise is at 06:00 and sunset at 20:37. On the last day of the month, sunrise is at 07:27 and sunset at 18:50 EEST.
Sunshine
In Lumijoki, the average sunshine in September is 6.7h.UV index
In Lumijoki, 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 radiation for ordinary individuals.Note: The maximum UV index of 3 during September leads to these instructions:
Be vigilant - Preventing sunburn is recommended. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Lumijoki?
What is the average humidity in September in Lumijoki?
What is the driest month in Lumijoki?
How many days does it rain in September in Lumijoki?
When does it start snowing in Lumijoki?
What is the average length of the day in September in Lumijoki?
When is the sunrise / sunset in September in Lumijoki?
How many hours of sunshine does Lumijoki have in September?
What is the UV index intensity in September in Lumijoki?
Average temperature in September
Lumijoki, Finland
- Average high temperature in September: 13°C
The warmest month (with the highest average high temperature) is July (20°C).
The month with the lowest average high temperature is January (-6.1°C).
- Average low temperature in September: 7.7°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-10.6°C).
Average pressure in September
Lumijoki, Finland
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1005.4mbar).
Average wind speed in September
Lumijoki, Finland
- Average wind speed in September: 12.8km/h
The windiest month (with the highest average wind speed) is November (13.7km/h).
The calmest month (with the lowest average wind speed) is July (10.6km/h).
Average humidity in September
Lumijoki, 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 (69%).
Average rainfall in September
Lumijoki, Finland
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is July (59mm).
The driest months (with the least rainfall) are April and September (25mm).
Average rainfall days in September
Lumijoki, Finland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Lumijoki, Finland
- Average snowfall in September: 2mm
The month with the highest snowfall is March (232mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Lumijoki, Finland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Lumijoki, Finland
- Average daylight in September: 13h and 1min
The month with the longest days is June (Average daylight: 21h and 30min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 0min).
Average sunshine days in September
Lumijoki, Finland
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is June (17 days).
The month with the least sunshine days is December (7.4 days).
Average UV index in September
Lumijoki, 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
Lumijoki, Finland
- Average cloud cover in September: 55
The month with the most cloud cover is February (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 43).
Average visibility in September
Lumijoki, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (6km).
