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
With the onset of September, Iisvesi experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 19.3°C (66.7°F) in August to a mild 13.6°C (56.5°F). Throughout September, Iisvesi records an average temperature of 7.9°C (46.2°F) at night.Humidity
In September, the average relative humidity in Iisvesi is 82%.Rainfall
In Iisvesi, in September, it is raining for 12.5 days, with typically 25mm (0.98") of accumulated precipitation. In Iisvesi, during the entire year, the rain falls for 106.5 days and collects up to 384mm (15.12") of precipitation.Snowfall
Months with snowfall in Iisvesi, Finland, are January through June, September through December. September is the first month it typically snows in Iisvesi. Throughout September, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, in Iisvesi, there are 110.8 snowfall days, and 1074mm (42.28") of snow is accumulated.Daylight
In Iisvesi, the average length of the day in September is 12h and 58min.On the first day of September in Iisvesi, sunrise is at 06:00 and sunset at 20:22. On the last day of the month, sunrise is at 07:18 and sunset at 18:45 EEST.
Sunshine
In September, the average sunshine is 6.4h.UV index
In Iisvesi, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average September temperature in Iisvesi?
What is the average humidity in September in Iisvesi?
How many days does it rain in September in Iisvesi?
When does it start to snow in Iisvesi?
How many hours of daylight does Iisvesi have in September?
What time are sunrise and sunset in September in Iisvesi?
How many hours of sunshine does Iisvesi have in September?
How high is the UV index in September in Iisvesi?
Average temperature in September
Iisvesi, Finland
- Average high temperature in September: 13.6°C
The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 7.9°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-9.9°C).
Average pressure in September
Iisvesi, Finland
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Iisvesi, Finland
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is November (15km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).
Average humidity in September
Iisvesi, Finland
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Iisvesi, Finland
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is July (48mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Iisvesi, Finland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (13.7 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Iisvesi, Finland
- Average snowfall in September: 2mm
The month with the highest snowfall is January (230mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Iisvesi, Finland
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (23.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Iisvesi, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 19h and 54min).
The month with the shortest days is December (Average daylight: 5h and 6min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 0h and 48min).
Average sunshine days in September
Iisvesi, Finland
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Iisvesi, Finland
- 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
Iisvesi, Finland
- Average cloud cover in September: 58
The months with the most cloud cover are January and February (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Iisvesi, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (5km).
Iisvesi, Finland
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