September weather forecastBierna, Poland
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Bierna, Poland, with an average temperature ranging between max 18.2°C (64.8°F) and min 9.5°C (49.1°F).Temperature
During Bierna's transition into September, the average high-temperature lessens, moving from a warm 24.1°C (75.4°F) in August to an enjoyable 18.2°C (64.8°F). Bierna observes an average nighttime temperature of 9.5°C (49.1°F) during September.Humidity
In Bierna, the average relative humidity in September is 76%.Rainfall
In Bierna, Poland, during September, the rain falls for 14.6 days and regularly aggregates up to 52mm (2.05") of precipitation. Throughout the year, there are 172.8 rainfall days, and 645mm (25.39") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Bierna, Poland.Daylight
In September, the average length of the day is 12h and 37min.On the first day of the month, sunrise is at 05:59 and sunset at 19:26. On the last day of September, sunrise is at 06:42 and sunset at 18:23 CEST.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Bierna, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bierna, Poland
- Average high temperature in September: 18.2°C
The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (0°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-4.8°C).
Average pressure in September
Bierna, Poland
- Average pressure in September: 1017.7mbar
The months with the highest atmospheric pressure are October and December (1018.8mbar).
The months with the lowest atmospheric pressure are June and July (1014.6mbar).
Average wind speed in September
Bierna, Poland
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is December (12km/h).
The calmest month (with the lowest average wind speed) is August (8.4km/h).
Average humidity in September
Bierna, Poland
- Average humidity in September: 76%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Bierna, Poland
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is May (89mm).
The driest month (with the least rainfall) is November (30mm).
Average rainfall days in September
Bierna, Poland
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is July (21.4 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in September
Bierna, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (262mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Bierna, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bierna, Poland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in September
Bierna, Poland
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (15.5 days).
The month with the least sunshine days is June (5.8 days).
Average UV index in September
Bierna, 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
Bierna, Poland
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Bierna, 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).
