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
Stepping into September, Siikainen observes a temperature decline, with the average high falling from August's comfortable 19.8°C (67.6°F) to a still refreshing 14.6°C (58.3°F). In the month of September, Siikainen experiences an average low-temperature of 7.5°C (45.5°F).Humidity
In Siikainen, the average relative humidity in September is 83%.Rainfall
The months with the least rainfall are April and September Rain falls for 15.3 days and accumulates 34mm (1.34") of rain.Snowfall
June through September are months without snowfall.Daylight
In Siikainen, the average length of the day in September is 12h and 56min.On the first day of September, sunrise is at 06:23 and sunset at 20:41. On the last day of the month, sunrise is at 07:38 and sunset at 19:06 EEST.
Sunshine
In September, the average sunshine is 6.7h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September in Siikainen?
What is the driest month in Siikainen?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Siikainen, Finland
- Average high temperature in September: 14.6°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-4.3°C).
- Average low temperature in September: 7.5°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in September
Siikainen, Finland
- Average pressure in September: 1012.6mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1006.8mbar).
Average wind speed in September
Siikainen, Finland
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is December (13.1km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in September
Siikainen, Finland
- Average humidity in September: 83%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is May (67%).
Average rainfall in September
Siikainen, Finland
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is July (54mm).
The driest months (with the least rainfall) are April and September (34mm).
Average rainfall days in September
Siikainen, Finland
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in September
Siikainen, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (234mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Siikainen, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Siikainen, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 30min).
The month with the shortest days is December (Average daylight: 5h and 24min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 1h and 48min).
Average sunshine days in September
Siikainen, Finland
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is May (14.4 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in September
Siikainen, 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
Siikainen, Finland
- Average cloud cover in September: 56
The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are June and July (Cloud cover 44).
Average visibility in September
Siikainen, 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 (6km).
