September weather forecastRisby, Denmark
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Risby, Denmark, with temperature in the range of an average low of 13.1°C (55.6°F) and an average high of 16.5°C (61.7°F).Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a pleasant 20.1°C (68.2°F) to an enjoyable 16.5°C (61.7°F). An average low-temperature of 13.1°C (55.6°F) characterizes Risby's September nights.Humidity
In September, the average relative humidity in Risby is 79%.Rainfall
In Risby, during September, the rain falls for 14.4 days and regularly aggregates up to 36mm (1.42") of precipitation. Throughout the year, in Risby, there are 159.2 rainfall days, and 413mm (16.26") of precipitation is accumulated.Snowfall
May through October are months without snowfall in Risby.Daylight
The average length of the day in September is 12h and 44min.On the first day of September in Risby, sunrise is at 06:16 and sunset at 20:04. On the last day of the month, sunrise is at 07:12 and sunset at 18:48 CEST.
Sunshine
In Risby, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Risby, Denmark
- Average high temperature in September: 16.5°C
The warmest months (with the highest average high temperature) are July and August (20.1°C).
The month with the lowest average high temperature is February (2.7°C).
- Average low temperature in September: 13.1°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is February (-0.1°C).
Average pressure in September
Risby, Denmark
- Average pressure in September: 1015.3mbar
The month with the highest atmospheric pressure is April (1015.6mbar).
The month with the lowest atmospheric pressure is December (1011.2mbar).
Average wind speed in September
Risby, Denmark
- Average wind speed in September: 18.2km/h
The windiest month (with the highest average wind speed) is December (21.7km/h).
The calmest month (with the lowest average wind speed) is July (15.3km/h).
Average humidity in September
Risby, Denmark
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Risby, Denmark
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is August (59mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in September
Risby, Denmark
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is August (16.9 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in September
Risby, Denmark
- Average snowfall in September: 0mm
The month with the highest snowfall is December (36mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Risby, Denmark
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7 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
Risby, Denmark
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Risby, Denmark
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is March (17.4 days).
The month with the least sunshine days is December (8.8 days).
Average UV index in September
Risby, Denmark
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Risby, Denmark
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 70).
The months with the least cloud cover are June and August (Cloud cover 38).
Average visibility in September
Risby, Denmark
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).
