September weather forecastSiennów, Poland
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Siennów, Poland, with an average temperature ranging between max 20°C (68°F) and min 9.8°C (49.6°F).Temperature
The arrival of September signals a shift in temperature, down from a moderately hot 25.8°C (78.4°F) in August to an agreeable 20°C (68°F). An average low-temperature of 9.8°C (49.6°F) marks the nights throughout September.Humidity
The average relative humidity in September is 73%.Rainfall
In Siennów, in September, it is raining for 8.9 days, with typically 16mm (0.63") of accumulated precipitation. In Siennów, during the entire year, the rain falls for 124.8 days and collects up to 295mm (11.61") of precipitation.Snowfall
In Siennów, Poland, snow does not fall in May through September.Daylight
In Siennów, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 05:45 and sunset at 19:13. On the last day of September, sunrise is at 06:29 and sunset at 18:10 CEST.
Sunshine
The average sunshine in September in Siennów, Poland, is 7.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siennów, Poland
- Average high temperature in September: 20°C
The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (-0.1°C).
- Average low temperature in September: 9.8°C
The months with the highest average low temperature are July and August (13.9°C).
The coldest month (with the lowest average low temperature) is January (-4.5°C).
Average pressure in September
Siennów, Poland
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is October (1019.2mbar).
The month with the lowest atmospheric pressure is July (1014.2mbar).
Average wind speed in September
Siennów, Poland
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is December (13.9km/h).
The calmest month (with the lowest average wind speed) is August (9.3km/h).
Average humidity in September
Siennów, Poland
- Average humidity in September: 73%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Siennów, Poland
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is May (47mm).
The driest month (with the least rainfall) is January (15mm).
Average rainfall days in September
Siennów, Poland
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in September
Siennów, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (54mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Siennów, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Siennów, Poland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Siennów, Poland
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Siennów, 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, November and December (UV index 1).
Average cloud cover in September
Siennów, Poland
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Siennów, Poland
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and February (7km).
