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
Weather in September
Temperature
September reveals a small adjustment in temperature, transitioning from an average high of a comfortable 19.7°C (67.5°F) in August to a still refreshing 15.3°C (59.5°F). The average temperature during September nights dips to a cool 10.2°C (50.4°F).Humidity
In September, the average relative humidity in Lieto is 79%.Rainfall
In September, in Lieto, the rain falls for 13.6 days. Throughout September, 36mm (1.42") of precipitation is accumulated. Throughout the year, there are 133.7 rainfall days, and 390mm (15.35") of precipitation is accumulated.Snowfall
In Lieto, snow does not fall in June through September.Daylight
In September, the average length of the day in Lieto is 12h and 53min.On the first day of the month, sunrise is at 06:25 and sunset at 20:34. On the last day of September, in Lieto, sunrise is at 07:34 and sunset at 19:05 EEST.
Sunshine
The average sunshine in September is 7.7h.UV index
In Lieto, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 3 during September leads to these advisories:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the average September temperature in Lieto?
What is the average humidity in September in Lieto?
How many days does it rain in September in Lieto?
When it does not snow in Lieto?
Does it snow in Lieto in September?
What is the average length of the day in September in Lieto?
What time are sunrise and sunset in September in Lieto?
How many hours of sunshine does Lieto have in September?
What is the UV index intensity in September in Lieto?
Average temperature in September
Lieto, Finland
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in September: 10.2°C
The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).
Average pressure in September
Lieto, Finland
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).
Average wind speed in September
Lieto, Finland
- Average wind speed in September: 15.8km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in September
Lieto, Finland
- Average humidity in September: 79%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Lieto, Finland
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Lieto, Finland
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in September
Lieto, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Lieto, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lieto, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Lieto, Finland
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).
Average UV index in September
Lieto, Finland
- Average UV index in September: 3
The months with the highest UV index are June, July and August (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
Lieto, Finland
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Lieto, Finland
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).
Lieto, Finland
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