September weather forecastNiwna, Poland
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Niwna, Poland, with an average temperature fluctuating between 10.7°C (51.3°F) and 19.3°C (66.7°F).Temperature
During the transition into September, Niwna observes a decrease in the average high-temperature, falling from a moderately hot 24.8°C (76.6°F) in August to a comfortable 19.3°C (66.7°F). Throughout the nights in September, an average low-temperature of 10.7°C (51.3°F) is noted.Humidity
In September, the average relative humidity in Niwna is 72%.Rainfall
In Niwna, in September, during 11.9 rainfall days, 36mm (1.42") of precipitation is typically accumulated. Throughout the year, there are 166.9 rainfall days, and 477mm (18.78") of precipitation is accumulated.Snowfall
In Niwna, snow does not fall in June through September.Daylight
In Niwna, the average length of the day in September is 12h and 39min.On the first day of September in Niwna, sunrise is at 05:51 and sunset at 19:25. On the last day of the month, sunrise is at 06:38 and sunset at 18:18 CEST.
Sunshine
In September, the average sunshine in Niwna is 8h.UV index
In Niwna, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 3 translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Niwna, Poland
- Average high temperature in September: 19.3°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (0°C).
- Average low temperature in September: 10.7°C
The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).
Average pressure in September
Niwna, Poland
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is October (1018.1mbar).
The month with the lowest atmospheric pressure is July (1013.7mbar).
Average wind speed in September
Niwna, Poland
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is December (15.3km/h).
The calmest month (with the lowest average wind speed) is August (11km/h).
Average humidity in September
Niwna, Poland
- Average humidity in September: 72%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Niwna, Poland
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is June (65mm).
The driest month (with the least rainfall) is November (23mm).
Average rainfall days in September
Niwna, Poland
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (20.7 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Niwna, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (138mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Niwna, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Niwna, 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: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Niwna, Poland
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (16.6 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Niwna, 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 and December (UV index 1).
Average cloud cover in September
Niwna, Poland
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Niwna, Poland
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The month with the lowest visibility is January (7km).
