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
Start of September brings a shift in the average high-temperature, falling from August's warm 24.2°C (75.6°F) to an enjoyable 18.3°C (64.9°F). September nights in Sierki, Poland, cool down to an average low-temperature of 9.5°C (49.1°F).Humidity
In Sierki, the average relative humidity in September is 76%.Rainfall
In September, in Sierki, the rain falls for 13.4 days. Throughout September, 37mm (1.46") of precipitation is accumulated. In Sierki, during the entire year, the rain falls for 164.4 days and collects up to 515mm (20.28") of precipitation.Snowfall
In Sierki, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 41min.On the first day of the month, sunrise is at 05:39 and sunset at 19:18. On the last day of September, sunrise is at 06:29 and sunset at 18:08 CEST.
Sunshine
In September, the average sunshine is 7.5h.UV index
The average daily maximum UV index in September in Sierki, Poland, is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are September temperatures in Sierki?
What is the average humidity in September in Sierki?
How much does it rain in Sierki in September?
When it does not snow in Sierki?
Does it snow in Sierki in September?
What is the average length of the day in September in Sierki?
What time are sunrise and sunset in September in Sierki?
How long on average sun shines in September in Sierki?
What is the UV index reading in September in Sierki?
Average temperature in September
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, Poland
- Average daylight in September: 12h and 4min
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 3min
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
Sierki, 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
Sierki, 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
Sierki, 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
Sierki, 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).
Sierki, Poland
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