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
September's arrival corresponds with a decrease in average high-temperatures, from August's pleasant 20.5°C (68.9°F) to a refreshing 14.7°C (58.5°F). During September, Lemi records a consistent average nighttime temperature of 8.5°C (47.3°F).Humidity
The average relative humidity in September is 81%.Rainfall
In Lemi, Finland, in September, during 16 rainfall days, 43mm (1.69") of precipitation is typically accumulated. In Lemi, during the entire year, the rain falls for 150.8 days and collects up to 525mm (20.67") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 54min.On the first day of the month, sunrise is at 06:02 and sunset at 20:15. On the last day of September, sunrise is at 07:13 and sunset at 18:43 EEST.
Sunshine
The average sunshine in September in Lemi is 6.6h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 2 in September interprets into the following advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Lemi?
What is the average humidity in September in Lemi?
How many days does it rain in September in Lemi?
When it does not snow in Lemi?
Does it snow in Lemi in September?
What is the average length of the day in September in Lemi?
What time are sunrise and sunset in September in Lemi?
How many hours of sunshine does Lemi have in September?
What is the UV index reading in September in Lemi?
Average temperature in September
Lemi, Finland
- Average high temperature in September: 14.7°C
The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (-4.7°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-8.6°C).
Average pressure in September
Lemi, Finland
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in September
Lemi, Finland
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is December (13.7km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in September
Lemi, Finland
- Average humidity in September: 81%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (66%).
Average rainfall in September
Lemi, Finland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (32mm).
Average rainfall days in September
Lemi, Finland
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Lemi, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (262mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Lemi, Finland
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (22.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lemi, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average sunshine days in September
Lemi, Finland
- Average sunshine days in September: 8.9 days
The month with the most sunshine days is May (14.3 days).
The month with the least sunshine days is December (4.7 days).
Average UV index in September
Lemi, Finland
- Average UV index in September: 2
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
Lemi, Finland
- Average cloud cover in September: 56
The month with the most cloud cover is February (Cloud cover 84).
The months with the least cloud cover are July and August (Cloud cover 42).
Average visibility in September
Lemi, 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).
