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's arrival comes with a decrease in the average high-temperature, moving from a pleasant 20.3°C (68.5°F) in August to a refreshing 14.9°C (58.8°F). Throughout September, the temperature in Jänhijoki falls to an average low of 7.6°C (45.7°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In Jänhijoki, during September, the rain falls for 12.7 days and regularly aggregates up to 30mm (1.18") of precipitation. Throughout the year, there are 128.2 rainfall days, and 406mm (15.98") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 53min.On the first day of the month, sunrise is at 06:20 and sunset at 20:31. On the last day of September, in Jänhijoki, sunrise is at 07:31 and sunset at 19:00 EEST.
Sunshine
In September, the average sunshine is 7h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Jänhijoki?
What is the average humidity in September in Jänhijoki?
How much does it rain in Jänhijoki in September?
When it does not snow in Jänhijoki?
Does it snow in Jänhijoki in September?
What is the average length of the day in September in Jänhijoki?
What time are sunrise and sunset in September in Jänhijoki?
How many hours of sunshine does Jänhijoki have in September?
What is the UV index reading in September in Jänhijoki?
Average temperature in September
Jänhijoki, Finland
- Average high temperature in September: 14.9°C
The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-4°C).
- Average low temperature in September: 7.6°C
The month with the highest average low temperature is July (12.2°C).
The coldest month (with the lowest average low temperature) is January (-8.1°C).
Average pressure in September
Jänhijoki, 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 (1007.8mbar).
Average wind speed in September
Jänhijoki, Finland
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is December (14.2km/h).
The calmest month (with the lowest average wind speed) is August (10.8km/h).
Average humidity in September
Jänhijoki, Finland
- Average humidity in September: 83%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is May (68%).
Average rainfall in September
Jänhijoki, Finland
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is July (54mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Jänhijoki, Finland
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Jänhijoki, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (165mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Jänhijoki, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jänhijoki, 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 48min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Jänhijoki, Finland
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Jänhijoki, 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
Jänhijoki, Finland
- Average cloud cover in September: 53
The month with the most cloud cover is February (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in September
Jänhijoki, Finland
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The month with the lowest visibility is February (6km).
Jänhijoki, Finland
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