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
September
Weather in September
Temperature
September indicates a minor shift in the average high-temperature, from August's agreeable 22.8°C (73°F) to a refreshing 19.6°C (67.3°F). The average low-temperature in Witternesse during September nights is a fresh 11.4°C (52.5°F).Humidity
In Witternesse, the average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Witternesse, France. Rain falls for 10.4 days and accumulates 18mm (0.71") of precipitation.Snowfall
April through October are months without snowfall in Witternesse.Daylight
The average length of the day in September in Witternesse is 12h and 37min.On the first day of the month, sunrise is at 07:05 and sunset at 20:35. On the last day of September, in Witternesse, sunrise is at 07:50 and sunset at 19:30 CEST.
Sunshine
In September, the average sunshine in Witternesse is 7.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Witternesse?
What is the average humidity in September in Witternesse?
What is the driest month in Witternesse?
How many days does it rain in September in Witternesse?
When it does not snow in Witternesse?
How many hours of daylight does Witternesse have in September?
When is the sunrise / sunset in September in Witternesse?
How many hours of sunshine does Witternesse have in September?
How high is the UV index in September in Witternesse?
Average temperature in September
Witternesse, France
- Average high temperature in September: 19.6°C
The warmest months (with the highest average high temperature) are July and August (22.8°C).
The month with the lowest average high temperature is January (5.7°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.2°C).
Average pressure in September
Witternesse, France
- Average pressure in September: 1017.6mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1012.3mbar).
Average wind speed in September
Witternesse, France
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is August (12.5km/h).
Average humidity in September
Witternesse, France
- Average humidity in September: 77%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Witternesse, France
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (49mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in September
Witternesse, France
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is September (10.4 days).
Average snowfall in September
Witternesse, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (30mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Witternesse, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Witternesse, France
- 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 1min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Witternesse, France
- Average sunshine days in September: 17 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is January (11.3 days).
Average UV index in September
Witternesse, France
- 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
Witternesse, France
- Average cloud cover in September: 44
The months with the most cloud cover are January and November (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
Witternesse, France
- 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).
