September weather forecastSlupsk, Poland
September
Weather in September
September marks the onset of autumn in Slupsk with a noticeable dip in temperatures. However, it brings about an upswing in the amount of rainfall, showing a clear transition from the drier summer months. September still maintains the bearable temperature ranges of summer, but demonstrates the fall characteristics more dominantly. This month represents an appreciable mix of summer and autumn, making it one of the most sought-after periods in the city.Temperature
September indicates a minor shift in the average high-temperature, from August's agreeable 22.8°C (73°F) to an enjoyable 17.9°C (64.2°F). An average low-temperature of 11.8°C (53.2°F) marks the nights throughout September.Humidity
The average relative humidity in September is 75%.Rainfall
In Slupsk, Poland, during September, the rain falls for 11.1 days and regularly aggregates up to 32mm (1.26") of precipitation. Throughout the year, in Slupsk, there are 129.2 rainfall days, and 353mm (13.9") of precipitation is accumulated.Snowfall
June through October are months without snowfall in Slupsk.Daylight
In Slupsk, Poland, the average length of the day in September is 12h and 43min.On the first day of the month, sunrise is at 06:00 and sunset at 19:43. On the last day of September, sunrise is at 06:53 and sunset at 18:30 CEST.
Sunshine
The average sunshine in September is 8.1h.UV index
In Slupsk, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Slupsk, Poland
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (1.2°C).
- Average low temperature in September: 11.8°C
The month with the highest average low temperature is August (14.7°C).
The coldest month (with the lowest average low temperature) is January (-1.7°C).
Average pressure in September
Slupsk, Poland
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is October (1016.3mbar).
The month with the lowest atmospheric pressure is December (1012.9mbar).
Average wind speed in September
Slupsk, Poland
- Average wind speed in September: 15.5km/h
The windiest month (with the highest average wind speed) is December (19.4km/h).
The calmest month (with the lowest average wind speed) is August (13.9km/h).
Average humidity in September
Slupsk, Poland
- Average humidity in September: 75%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is April (70%).
Average rainfall in September
Slupsk, Poland
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is July (38mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Slupsk, Poland
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is April (8 days).
Average snowfall in September
Slupsk, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (72mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Slupsk, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Slupsk, Poland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and December (Average sunshine: 2h and 48min).
Average sunshine days in September
Slupsk, Poland
- Average sunshine days in September: 17.1 days
The months with the most sunshine days are April and May (19.8 days).
The month with the least sunshine days is December (12 days).
Average UV index in September
Slupsk, Poland
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Slupsk, Poland
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Slupsk, Poland
- Average visibility in September: 10km
The months with the highest visibility are April, June, August, September and October (10km).
The months with the lowest visibility are January, February, March, May, July, November and December (9km).
