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
The arrival of September indicates a decrease in the average high-temperature, moving from a refreshing 16.4°C (61.5°F) in August to a fresh 10.7°C (51.3°F). In the month of September, the nighttime temperature dips to a steady average of 4.3°C (39.7°F).Humidity
The average relative humidity in September in Unari is 86%.Rainfall
In September, in Unari, the rain falls for 15.5 days. Throughout September, 41mm (1.61") of precipitation is accumulated. Throughout the year, there are 124.5 rainfall days, and 468mm (18.43") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 8mm (0.31") of snow. Throughout the year, in Unari, there are 143.9 snowfall days, and 1538mm (60.55") of snow is accumulated.Daylight
In Unari, the average length of the day in September is 13h and 10min.On the first day of the month, sunrise is at 05:49 and sunset at 20:44. On the last day of September, sunrise is at 07:27 and sunset at 18:46 EEST.
Sunshine
The average sunshine in September in Unari is 5.4h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 2 during September translates into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What are the temperatures in Unari in September?
What is the average humidity in September in Unari?
How many days does it rain in September in Unari?
When does it start snowing in Unari?
How many hours of daylight does Unari have in September?
What time are sunrise and sunset in September in Unari?
How many hours of sunshine does Unari have in September?
What is the UV index reading in September in Unari?
Average temperature in September
Unari, Finland
- Average high temperature in September: 10.7°C
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is January (-8.8°C).
- Average low temperature in September: 4.3°C
The month with the highest average low temperature is July (10.3°C).
The coldest month (with the lowest average low temperature) is January (-14.6°C).
Average pressure in September
Unari, Finland
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.2mbar).
Average wind speed in September
Unari, Finland
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is March (11.5km/h).
The calmest month (with the lowest average wind speed) is April (9.9km/h).
Average humidity in September
Unari, Finland
- Average humidity in September: 86%
The months with the highest relative humidity are January, February, April and December (96%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Unari, Finland
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is July (61mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days in September
Unari, Finland
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is January (2 days).
Average snowfall in September
Unari, Finland
- Average snowfall in September: 8mm
The month with the highest snowfall is December (261mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Unari, Finland
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is December (22.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Unari, Finland
- Average daylight in September: 13h and 1min
The month with the longest days is May (Average daylight: 20h and 6min).
The month with the shortest days is June (Average daylight: 0h and 0min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is August (Average sunshine: 8h and 30min).
The month with the least sunshine is June (Average sunshine: 0h and 36min).
Average sunshine days in September
Unari, Finland
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is October (12.8 days).
The month with the least sunshine days is April (6.1 days).
Average UV index in September
Unari, Finland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Unari, Finland
- Average cloud cover in September: 66
The month with the most cloud cover is January (Cloud cover 80).
The month with the least cloud cover is July (Cloud cover 52).
Average visibility in September
Unari, Finland
- Average visibility in September: 7km
The months with the highest visibility are June, July and August (9km).
The months with the lowest visibility are January, February, March, April, November and December (5km).
Unari, Finland
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