September weather forecastBiessum, Netherlands
September
Weather in September
September, the first month of the autumn in Biessum, is still a comfortable month, with temperature in the range of an average low of 12.1°C (53.8°F) and an average high of 17.9°C (64.2°F).Temperature
A moderate decline in average high-temperatures is noted in September, moving from an agreeable 21.2°C (70.2°F) in August to a comfortable 17.9°C (64.2°F). Biessum encounters a steady low-temperature average of 12.1°C (53.8°F) throughout the month of September.Humidity
In Biessum, the average relative humidity in September is 81%.Rainfall
In September, the rain falls for 11.9 days. Throughout September, 16mm (0.63") of precipitation is accumulated. Throughout the year, in Biessum, there are 146.3 rainfall days, and 214mm (8.43") of precipitation is accumulated.Snowfall
In Biessum, Netherlands, snow does not fall in April through October.Daylight
The average length of the day in September in Biessum is 12h and 41min.On the first day of September in Biessum, sunrise is at 06:42 and sunset at 20:21. On the last day of the month, sunrise is at 07:33 and sunset at 19:11 CEST.
Sunshine
In Biessum, the average sunshine in September is 7.3h.UV index
The average daily maximum UV index in September in Biessum is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Biessum, Netherlands
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (21.2°C).
The month with the lowest average high temperature is January (4.2°C).
- Average low temperature in September: 12.1°C
The month with the highest average low temperature is August (14.2°C).
The coldest month (with the lowest average low temperature) is January (0.9°C).
Average pressure in September
Biessum, Netherlands
- Average pressure in September: 1016.3mbar
The months with the highest atmospheric pressure are May and September (1016.3mbar).
The month with the lowest atmospheric pressure is November (1011.1mbar).
Average wind speed in September
Biessum, Netherlands
- Average wind speed in September: 16.1km/h
The windiest month (with the highest average wind speed) is December (22.4km/h).
The calmest month (with the lowest average wind speed) is July (14.7km/h).
Average humidity in September
Biessum, Netherlands
- Average humidity in September: 81%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are April and August (78%).
Average rainfall in September
Biessum, Netherlands
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is August (26mm).
The driest month (with the least rainfall) is April (11mm).
Average rainfall days in September
Biessum, Netherlands
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in September
Biessum, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is January (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Biessum, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Biessum, Netherlands
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 7h and 18min
The months with the most sunshine are July and August (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in September
Biessum, Netherlands
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is April (17.8 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in September
Biessum, Netherlands
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Biessum, Netherlands
- Average cloud cover in September: 46
The month with the most cloud cover is December (Cloud cover 68).
The months with the least cloud cover are April and August (Cloud cover 40).
Average visibility in September
Biessum, Netherlands
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, June and August (10km).
The months with the lowest visibility are January, May, July, September, October, November and December (9km).
