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
In the transition to September, Sionkylä observes a drop in the average high-temperature, moving from a pleasant 20.4°C (68.7°F) in August to a refreshing 14.8°C (58.6°F). In September, Sionkylä encounters an average low-temperature of 7.6°C (45.7°F) during the night.Humidity
In Sionkylä, Finland, the average relative humidity in September is 82%.Rainfall
In September, in Sionkylä, Finland, the rain falls for 11.9 days. Throughout September, 21mm (0.83") of precipitation is accumulated. Throughout the year, in Sionkylä, Finland, there are 114.9 rainfall days, and 260mm (10.24") of precipitation is accumulated.Snowfall
In Sionkylä, snow does not fall in June through September.Daylight
In Sionkylä, the average length of the day in September is 12h and 55min.On the first day of the month, sunrise is at 06:18 and sunset at 20:32. On the last day of September, sunrise is at 07:31 and sunset at 18:59 EEST.
Sunshine
In Sionkylä, Finland, the average sunshine in September is 6.7h.UV index
The average daily maximum UV index in September in Sionkylä is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 3 in September leads to these guidelines:
Prioritize safety - Suggestions to prevent sun damage are offered. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Sionkylä?
What is the average humidity in September in Sionkylä?
How many days does it rain in September in Sionkylä?
When it does not snow in Sionkylä?
Does it snow in Sionkylä in September?
How many hours of daylight does Sionkylä have in September?
What time are sunrise and sunset in September in Sionkylä?
How many hours of sunshine does Sionkylä have in September?
What is the UV index reading in September in Sionkylä?
Average temperature in September
Sionkylä, Finland
- Average high temperature in September: 14.8°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-4.3°C).
- Average low temperature in September: 7.6°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is January (-8.4°C).
Average pressure in September
Sionkylä, Finland
- Average pressure in September: 1012.8mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1007.5mbar).
Average wind speed in September
Sionkylä, Finland
- Average wind speed in September: 11km/h
The windiest month (with the highest average wind speed) is December (12.6km/h).
The calmest month (with the lowest average wind speed) is July (10km/h).
Average humidity in September
Sionkylä, Finland
- Average humidity in September: 82%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (66%).
Average rainfall in September
Sionkylä, Finland
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is July (37mm).
The driest months (with the least rainfall) are March and April (16mm).
Average rainfall days in September
Sionkylä, Finland
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Sionkylä, Finland
- Average snowfall in September: 0mm
The months with the highest snowfall are January, February and March (86mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sionkylä, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (17.8 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sionkylä, Finland
- Average daylight in September: 12h and 5min
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 36min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average sunshine days in September
Sionkylä, Finland
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (17.1 days).
The month with the least sunshine days is February (10.4 days).
Average UV index in September
Sionkylä, 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
Sionkylä, Finland
- Average cloud cover in September: 55
The month with the most cloud cover is February (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 44).
Average visibility in September
Sionkylä, 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, February and March (6km).
Sionkylä, Finland
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