September weather forecastSupraśl, Poland
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Supraśl, Poland, with an average temperature varying between 18.3°C (64.9°F) and 9.5°C (49.1°F).Temperature
Supraśl's weather changes with the onset of September, slightly falling from a moderately hot 24.2°C (75.6°F) in August to a refreshing 18.3°C (64.9°F). An average low-temperature of 9.5°C (49.1°F) is observed in Supraśl during the September nights.Humidity
In Supraśl, Poland, the average relative humidity in September is 76%.Rainfall
In September, in Supraśl, the rain falls for 13.4 days. Throughout September, 37mm (1.46") of precipitation is accumulated. In Supraśl, Poland, during the entire year, the rain falls for 164.4 days and collects up to 515mm (20.28") of precipitation.Snowfall
In Supraśl, snow does not fall in May through September.Daylight
The average length of the day in September in Supraśl is 12h and 41min.On the first day of September, sunrise is at 05:37 and sunset at 19:15. On the last day of the month, sunrise is at 06:27 and sunset at 18:05 CEST.
Sunshine
In Supraśl, Poland, the average sunshine in September is 7.5h.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 exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Supraśl, Poland
- Average high temperature in September: 18.3°C
The warmest months (with the highest average high temperature) are July and August (24.2°C).
The month with the lowest average high temperature is January (-1.5°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is July (13.7°C).
The coldest month (with the lowest average low temperature) is January (-5.1°C).
Average pressure in September
Supraśl, Poland
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is October (1018.2mbar).
The month with the lowest atmospheric pressure is July (1013.1mbar).
Average wind speed in September
Supraśl, Poland
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is December (13.2km/h).
The calmest month (with the lowest average wind speed) is August (9.7km/h).
Average humidity in September
Supraśl, Poland
- Average humidity in September: 76%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are April and August (70%).
Average rainfall in September
Supraśl, Poland
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is June (69mm).
The driest month (with the least rainfall) is April (27mm).
Average rainfall days in September
Supraśl, Poland
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Supraśl, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (192mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Supraśl, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Supraśl, Poland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 7h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 2h and 12min).
Average sunshine days in September
Supraśl, Poland
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is October (15.5 days).
The months with the least sunshine days are January and February (6.8 days).
Average UV index in September
Supraśl, Poland
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Supraśl, Poland
- Average cloud cover in September: 43
The months with the most cloud cover are January and February (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Supraśl, Poland
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September and October (9km).
The month with the lowest visibility is January (6km).
