September weather forecastNellim, Finland
September
Weather in September
Nellim's September weather carries strong characteristics of autumn, with a further dip in temperature. The vibrancy of the city's natural surroundings is enhanced by the beautiful autumn colours. The weather patterns gradually change with shorter daylight hours, reduced rainfall, and the return of snowfall. September marks the return of snowfall with an average volume of 9mm (0.35"), albeit much lower compared to the heavy snow season.Temperature
Nellim's weather subtly changes with the onset of September, barely falling from a refreshing 15°C (59°F) in August to a fresh 10.3°C (50.5°F). Nighttime temperatures hover around an average low of 5.3°C (41.5°F) in September.Humidity
In Nellim, the average relative humidity in September is 83%.Rainfall
In September, the rain falls for 14.3 days. Throughout September, 34mm (1.34") of precipitation is accumulated. Throughout the year, there are 115.3 rainfall days, and 395mm (15.55") of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.6 snowfall days, it receives 9mm (0.35") of snow. Throughout the year, there are 130.8 snowfall days, and 1094mm (43.07") of snow is accumulated.Daylight
The average length of the day in September is 13h and 17min.On the first day of September, sunrise is at 05:30 and sunset at 20:42. On the last day of the month, sunrise is at 07:18 and sunset at 18:34 EEST.
Sunshine
In Nellim, the average sunshine in September is 5.7h.UV index
In Nellim, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in September, converts into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nellim, Finland
- Average high temperature in September: 10.3°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (-8.5°C).
- Average low temperature in September: 5.3°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°C).
Average pressure in September
Nellim, Finland
- Average pressure in September: 1010.6mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1004.2mbar).
Average wind speed in September
Nellim, Finland
- Average wind speed in September: 14.7km/h
The windiest month (with the highest average wind speed) is March (16.2km/h).
The calmest month (with the lowest average wind speed) is August (12.6km/h).
Average humidity in September
Nellim, Finland
- Average humidity in September: 83%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is June (67%).
Average rainfall in September
Nellim, Finland
- Average rainfall in September: 34mm
The wettest months (with the highest rainfall) are June and July (48mm).
The driest month (with the least rainfall) is February (21mm).
Average rainfall days in September
Nellim, Finland
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Nellim, Finland
- Average snowfall in September: 9mm
The month with the highest snowfall is January (166mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Nellim, Finland
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is December (20.2 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Nellim, Finland
- Average daylight in September: 13h and 18min
The month with the longest days is August (Average daylight: 17h and 42min).
The month with the shortest days is June (Average daylight: 0h and 0min).
- Average sunshine in September: 5h and 42min
The month with the most sunshine is August (Average sunshine: 7h and 54min).
The month with the least sunshine is December (Average sunshine: 0h and 18min).
Average sunshine days in September
Nellim, Finland
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is January (13.8 days).
The month with the least sunshine days is April (8.1 days).
Average UV index in September
Nellim, 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
Nellim, Finland
- Average cloud cover in September: 62
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 56).
Average visibility in September
Nellim, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, April and December (7km).
