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 sea temperature 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
The onset of September brings an average high-temperature of a pleasant 22.6°C (72.7°F), nearly matching the August temperature. In the month of September, Bayonne records a consistent average low-temperature of 15.1°C (59.2°F).Humidity
In September, the average relative humidity is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 40mm (1.57") of precipitation.Snowfall
In Bayonne, snow does not fall in April through November.Sea temperature
In September, the average sea temperature in Bayonne is 20°C (68°F).Note: For most individuals, swimming in 20°C (68°F) is not enjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing control becomes increasingly difficult.
Daylight
In Bayonne, France, the average length of the day in September is 12h and 30min.On the first day of September in Bayonne, sunrise is at 07:30 and sunset at 20:41. On the last day of the month, sunrise is at 08:02 and sunset at 19:48 CEST.
Sunshine
The average sunshine in September is 8.4h.UV index
The months with the highest UV index in Bayonne are June through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
What are the temperatures in Bayonne in September?
What is the average humidity in September in Bayonne?
What is the driest month in Bayonne?
How many days does it rain in September in Bayonne?
When it does not snow in Bayonne?
What is the sea temperature in September in Bayonne?
What is the average length of the day in September in Bayonne?
When is the sunrise / sunset in September in Bayonne?
How many hours of sunshine does Bayonne have in September?
When is the highest UV index in Bayonne?
What is the UV index intensity in September in Bayonne?
Average temperature in September
Bayonne, France
- Average high temperature in September: 22.6°C
The warmest month (with the highest average high temperature) is August (24.4°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in September: 15.1°C
The month with the highest average low temperature is August (17.1°C).
The coldest month (with the lowest average low temperature) is February (6.2°C).
Average pressure in September
Bayonne, France
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Bayonne, France
- Average wind speed in September: 10.3km/h
The windiest months (with the highest average wind speed) are January and November (15.1km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).
Average humidity in September
Bayonne, France
- Average humidity in September: 74%
The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Bayonne, France
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is November (119mm).
The driest month (with the least rainfall) is September (40mm).
Average rainfall days in September
Bayonne, France
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is April (17.8 days).
The month with the least rainy days is October (13 days).
Average snowfall in September
Bayonne, France
- Average snowfall in September: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Bayonne, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Bayonne, France
- Average sea temperature in September: 20°C
The best month for swimming (with the highest average sea temperature) is August (22°C).
The coldest months (with the lowest average sea temperature) are February and March (12°C).
Average daylight in September /
Average sunshine in September
Bayonne, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is November (Average sunshine: 4h and 54min).
Average sunshine days in September
Bayonne, France
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (16.8 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Bayonne, France
- Average UV index in September: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Bayonne, France
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Bayonne, France
- Average visibility in September: 10km
The months with the highest visibility are February, March, June, August, September, October, November and December (10km).
The months with the lowest visibility are January, April, May and July (9km).
Bayonne, France
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