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
Keräsjoki's weather subtly changes with the onset of September, barely falling from a refreshing 16.7°C (62.1°F) in August to a fresh 12.3°C (54.1°F). Keräsjoki reports an average low temperature of 7.8°C (46°F) in September, a minor decrease from the day's highs.Humidity
In September, the average relative humidity is 82%.Rainfall
In September, the rain falls for 9.6 days. Throughout September, 26mm (1.02") of precipitation is accumulated. In Keräsjoki, during the entire year, the rain falls for 94 days and collects up to 347mm (13.66") of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. In Keräsjoki, during the entire year, snow falls for 89.7 days and aggregates up to 919mm (36.18") of snow.Daylight
In September, the average length of the day is 13h and 6min.On the first day of the month, sunrise is at 05:02 and sunset at 19:46. On the last day of September, sunrise is at 06:33 and sunset at 17:55 CEST.
Sunshine
In September, the average sunshine in Keräsjoki is 6.9h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 3 in September translates into this advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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?
How much does it rain in Keräsjoki in September?
When does it start to snow?
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?
How high is the UV index in September?
Average temperature in September
Keräsjoki, Sweden
- Average high temperature in September: 12.3°C
The warmest month (with the highest average high temperature) is July (18.3°C).
The month with the lowest average high temperature is January (-6.3°C).
- Average low temperature in September: 7.8°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 (-10.9°C).
Average pressure in September
Keräsjoki, Sweden
- Average pressure in September: 1010.9mbar
The month with the highest atmospheric pressure is May (1013.9mbar).
The month with the lowest atmospheric pressure is December (1004.9mbar).
Average wind speed in September
Keräsjoki, Sweden
- Average wind speed in September: 15.3km/h
The windiest months (with the highest average wind speed) are November and December (16.3km/h).
The calmest month (with the lowest average wind speed) is April (12km/h).
Average humidity in September
Keräsjoki, Sweden
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is June (70%).
Average rainfall in September
Keräsjoki, Sweden
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is December (42mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Keräsjoki, Sweden
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Keräsjoki, Sweden
- Average snowfall in September: 1mm
The month with the highest snowfall is March (203mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Keräsjoki, Sweden
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (19.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Keräsjoki, Sweden
- Average daylight in September: 13h and 1min
The month with the longest days is July (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 3h and 18min).
- Average sunshine in September: 6h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 12min).
Average sunshine days in September
Keräsjoki, Sweden
- Average sunshine days in September: 19 days
The month with the most sunshine days is June (20.8 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in September
Keräsjoki, Sweden
- 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
Keräsjoki, Sweden
- Average cloud cover in September: 51
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Keräsjoki, Sweden
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The month with the lowest visibility is January (6km).
