September weather forecastGränby, Sweden
September
Weather in September
September, the first month of the autumn in Gränby, is still a mild month, with an average temperature ranging between max 15.9°C (60.6°F) and min 9.5°C (49.1°F).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a pleasant 20.6°C (69.1°F) in August to a refreshing 15.9°C (60.6°F). The average temperature during September nights dips to a chilly 9.5°C (49.1°F).Humidity
In September, the average relative humidity in Gränby is 80%.Rainfall
In Gränby, during September, the rain falls for 13.2 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, in Gränby, there are 147.2 rainfall days, and 402mm (15.83") of precipitation is accumulated.Snowfall
In Gränby, Sweden, snow does not fall in June through September.Daylight
In Gränby, Sweden, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 05:44 and sunset at 19:50. On the last day of September, in Gränby, sunrise is at 06:51 and sunset at 18:22 CEST.
Sunshine
The average sunshine in September is 7.9h.UV index
In Gränby, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 3 transforms into the following advice:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gränby, Sweden
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-0.7°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).
Average pressure in September
Gränby, Sweden
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1007.7mbar).
Average wind speed in September
Gränby, Sweden
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is December (17.7km/h).
The calmest months (with the lowest average wind speed) are July and August (12.2km/h).
Average humidity in September
Gränby, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February and December (88%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Gränby, Sweden
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Gränby, Sweden
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Gränby, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (105mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Gränby, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gränby, Sweden
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in September
Gränby, Sweden
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is April (14.3 days).
The month with the least sunshine days is August (9.9 days).
Average UV index in September
Gränby, Sweden
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in September
Gränby, Sweden
- Average cloud cover in September: 44
The months with the most cloud cover are January and February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Gränby, Sweden
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February and March (8km).
