September weather forecastSiemień, Poland
September
Weather in September
September, the first month of the autumn in Siemień, is also an enjoyable month, with an average temperature fluctuating between 19.3°C (66.7°F) and 10.4°C (50.7°F).Temperature
The onset of September introduces a moderate change in Siemień's weather, with average high-temperatures falling from August's warm 25°C (77°F) to a refreshing 19.3°C (66.7°F). Throughout September, the average low-temperature dips to a cool 10.4°C (50.7°F).Humidity
The average relative humidity in September in Siemień, Poland, is 73%.Rainfall
In September, the rain falls for 11.7 days. Throughout September, 33mm (1.3") of precipitation is accumulated. Throughout the year, there are 149.5 rainfall days, and 457mm (17.99") of precipitation is accumulated.Snowfall
In Siemień, snow does not fall in May through September.Daylight
In Siemień, the average length of the day in September is 12h and 39min.On the first day of the month, sunrise is at 05:42 and sunset at 19:15. On the last day of September, sunrise is at 06:28 and sunset at 18:08 CEST.
Sunshine
In Siemień, the average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siemień, Poland
- Average high temperature in September: 19.3°C
The warmest month (with the highest average high temperature) is August (25°C).
The month with the lowest average high temperature is January (-0.8°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is August (14.6°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).
Average pressure in September
Siemień, Poland
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is October (1018.8mbar).
The month with the lowest atmospheric pressure is July (1013.8mbar).
Average wind speed in September
Siemień, Poland
- Average wind speed in September: 10.9km/h
The windiest month (with the highest average wind speed) is December (13.4km/h).
The calmest month (with the lowest average wind speed) is August (9.7km/h).
Average humidity in September
Siemień, Poland
- Average humidity in September: 73%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Siemień, Poland
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is May (62mm).
The driest month (with the least rainfall) is November (24mm).
Average rainfall days in September
Siemień, Poland
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in September
Siemień, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (158mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Siemień, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.9 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
Siemień, Poland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 48min
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 30min).
Average sunshine days in September
Siemień, Poland
- Average sunshine days in September: 15.9 days
The months with the most sunshine days are October and November (16.1 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in September
Siemień, Poland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Siemień, Poland
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Siemień, 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).
