September weather forecastNilsiä, Finland
September
Weather in September
September, the first month of the autumn in Nilsiä, is still a mild month, with an average temperature fluctuating between 13.6°C (56.5°F) and 7.9°C (46.2°F).Temperature
The transition into September involves a decrease in the average high-temperature, falling from 19.3°C (66.7°F) in August to a still refreshing 13.6°C (56.5°F). Nilsiä experiences a mean low-temperature of 7.9°C (46.2°F) during September.Humidity
The average relative humidity in September is 82%.Rainfall
In Nilsiä, in September, it is raining for 12.5 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, there are 106.5 rainfall days, and 384mm (15.12") 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 0.3 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, there are 110.8 snowfall days, and 1074mm (42.28") of snow is accumulated.Daylight
In Nilsiä, the average length of the day in September is 12h and 59min.On the first day of September, sunrise is at 05:54 and sunset at 20:20. On the last day of the month, sunrise is at 07:14 and sunset at 18:40 EEST.
Sunshine
The average sunshine in September is 6.4h.UV index
The average daily maximum UV index in September in Nilsiä is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 12min).
The month with the shortest days is December (Average daylight: 4h and 48min).
- Average sunshine in September: 6h and 24min
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
Nilsiä, 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
Nilsiä, 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
Nilsiä, 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
Nilsiä, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (5km).
