Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September is characterized by a slight reduction in average high-temperature, easing from a pleasant 22.7°C (72.9°F) in August to a comfortable 19.5°C (67.1°F). In Spiennes, September is marked by an average low-temperature of 10.5°C (50.9°F).Humidity
The average relative humidity in September in Spiennes, Belgium, is 79%.Rainfall
In Spiennes, in September, during 13.2 rainfall days, 32mm (1.26") of precipitation is typically accumulated. Throughout the year, there are 181.2 rainfall days, and 503mm (19.8") of precipitation is accumulated.Snowfall
April through September are months without snowfall in Spiennes.Daylight
In Spiennes, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 06:59 and sunset at 20:28. On the last day of September, in Spiennes, sunrise is at 07:43 and sunset at 19:24 CEST.
Sunshine
The average sunshine in September in Spiennes is 7.3h.UV index
In Spiennes, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What is the temperature in September in Spiennes?
What is the average humidity in September in Spiennes?
How many days does it rain in September in Spiennes?
When it does not snow in Spiennes?
Does it snow in Spiennes in September?
How many hours of daylight does Spiennes have in September?
When are sunrise and sunset in September in Spiennes?
How long on average sun shines in September in Spiennes?
What is the UV index reading in September in Spiennes?
Average temperature in September
Spiennes, Belgium
- Average high temperature in September: 19.5°C
The warmest months (with the highest average high temperature) are July and August (22.7°C).
The month with the lowest average high temperature is January (5°C).
- Average low temperature in September: 10.5°C
The months with the highest average low temperature are July and August (12.9°C).
The coldest month (with the lowest average low temperature) is January (0.7°C).
Average pressure in September
Spiennes, Belgium
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1012.6mbar).
Average wind speed in September
Spiennes, Belgium
- Average wind speed in September: 12.3km/h
The windiest month (with the highest average wind speed) is December (18.8km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).
Average humidity in September
Spiennes, Belgium
- Average humidity in September: 79%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in September
Spiennes, Belgium
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is December (60mm).
The driest month (with the least rainfall) is April (28mm).
Average rainfall days in September
Spiennes, Belgium
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is March (12.8 days).
Average snowfall in September
Spiennes, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (31mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Spiennes, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 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
Spiennes, Belgium
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 48min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Spiennes, Belgium
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (15.7 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Spiennes, Belgium
- Average UV index in September: 4
The months with the highest UV index are June, 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
Spiennes, Belgium
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are April and August (Cloud cover 43).
Average visibility in September
Spiennes, Belgium
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Spiennes, Belgium
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