Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A moderate decline in the average high-temperature is seen during September, decreasing from a warm 23.9°C (75°F) in August to a refreshing 18.5°C (65.3°F). An average nighttime temperature of 10.4°C (50.7°F) is recorded during September.Humidity
In September, the average relative humidity in Siewierz is 74%.Rainfall
In Siewierz, in September, during 12.1 rainfall days, 37mm (1.46") of precipitation is typically accumulated. Throughout the year, in Siewierz, there are 138.8 rainfall days, and 438mm (17.24") of precipitation is accumulated.Snowfall
In Siewierz, snow does not fall in June through September.Daylight
In Siewierz, the average length of the day in September is 12h and 37min.On the first day of September, sunrise is at 05:58 and sunset at 19:27. On the last day of the month, sunrise is at 06:42 and sunset at 18:23 CEST.
Sunshine
In Siewierz, Poland, the average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What are September temperatures in Siewierz?
What is the average humidity in September in Siewierz?
How much does it rain in Siewierz in September?
When it does not snow in Siewierz?
Does it snow in Siewierz in September?
What is the average length of the day in September in Siewierz?
When is the sunrise / sunset in September in Siewierz?
How many hours of sunshine does Siewierz have in September?
What is the UV index intensity in September in Siewierz?
Average temperature in September
Siewierz, Poland
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is August (23.9°C).
The month with the lowest average high temperature is January (-0.7°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 (-4.1°C).
Average pressure in September
Siewierz, Poland
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is October (1018.7mbar).
The month with the lowest atmospheric pressure is July (1014.4mbar).
Average wind speed in September
Siewierz, Poland
- Average wind speed in September: 12.1km/h
The windiest month (with the highest average wind speed) is December (16.6km/h).
The calmest month (with the lowest average wind speed) is August (10.8km/h).
Average humidity in September
Siewierz, Poland
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and August (69%).
Average rainfall in September
Siewierz, Poland
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is July (71mm).
The driest month (with the least rainfall) is November (18mm).
Average rainfall days in September
Siewierz, Poland
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in September
Siewierz, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (116mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Siewierz, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Siewierz, Poland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in September
Siewierz, Poland
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Siewierz, Poland
- Average UV index in September: 3
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
Siewierz, Poland
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Siewierz, Poland
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The months with the lowest visibility are January, February and December (8km).
Siewierz, Poland
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