Click on a day for an hourly weather forecast
The temperatures in Bayonne in September are comfortable with low of 18°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Bayonne during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Bayonne in September 2025.
If you’re planning to visit Bayonne in the near future, we highly recommend that you review the 14 day weather forecast for Bayonne before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 6 | 18 | 7 | 50 mm | Awful | Bayonne in January |
| February | 4° / -1° | 5 | 16 | 7 | 64 mm | Awful | Bayonne in February |
| March | 8° / 3° | 5 | 22 | 4 | 70 mm | Bad | Bayonne in March |
| April | 14° / 8° | 5 | 25 | 0 | 63 mm | Good | Bayonne in April |
| May | 19° / 13° | 6 | 25 | 0 | 90 mm | Good | Bayonne in May |
| June | 24° / 18° | 5 | 25 | 0 | 103 mm | Perfect | Bayonne in June |
| July | 28° / 22° | 7 | 24 | 0 | 134 mm | Good | Bayonne in July |
| August | 27° / 22° | 5 | 26 | 0 | 122 mm | Perfect | Bayonne in August |
| September | 24° / 18° | 4 | 26 | 0 | 83 mm | Perfect | Bayonne in September |
| October | 18° / 13° | 5 | 26 | 0 | 79 mm | Good | Bayonne in October |
| November | 12° / 7° | 4 | 25 | 1 | 50 mm | Ok | Bayonne in November |
| December | 7° / 2° | 5 | 21 | 5 | 78 mm | Bad | Bayonne in December |