September weather forecastGranne, Poland
September
Weather in September
September, the first month of the autumn in Granne, is also an enjoyable month, with an average temperature varying between 10.1°C (50.2°F) and 18.7°C (65.7°F).Temperature
As August transitions to September, the average high-temperature falls from a warm 24.5°C (76.1°F) to a refreshing 18.7°C (65.7°F). An average low-temperature of 10.1°C (50.2°F) marks the nights in Granne throughout September.Humidity
In Granne, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.5 days and typically collects 18mm (0.71") of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 40min.On the first day of September, sunrise is at 05:41 and sunset at 19:17. On the last day of the month, sunrise is at 06:30 and sunset at 18:09 CEST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Granne, Poland
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (24.5°C).
The month with the lowest average high temperature is January (-0.9°C).
- Average low temperature in September: 10.1°C
The months with the highest average low temperature are July and August (14.2°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).
Average pressure in September
Granne, Poland
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is October (1018.4mbar).
The month with the lowest atmospheric pressure is July (1013.5mbar).
Average wind speed in September
Granne, Poland
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is December (13.5km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).
Average humidity in September
Granne, Poland
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Granne, Poland
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is May (55mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in September
Granne, Poland
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in September
Granne, Poland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (154mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Granne, Poland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.4 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
Granne, Poland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Granne, Poland
- Average sunshine days in September: 20.6 days
The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is January (8.8 days).
Average UV index in September
Granne, 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
Granne, Poland
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Granne, 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).
