Click on a day for an hourly weather forecast
The temperatures in Bayonne in September are comfortable with low of 16°C and and high up to 23°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 2026.
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 | 11° / 6° | 10 | 20 | 1 | 182 mm | Bad | Bayonne in January |
| February | 12° / 7° | 9 | 18 | 1 | 151 mm | Bad | Bayonne in February |
| March | 14° / 8° | 7 | 23 | 0 | 110 mm | Ok | Bayonne in March |
| April | 16° / 9° | 7 | 23 | 0 | 111 mm | Ok | Bayonne in April |
| May | 18° / 12° | 8 | 24 | 0 | 131 mm | Ok | Bayonne in May |
| June | 22° / 15° | 6 | 24 | 0 | 127 mm | Good | Bayonne in June |
| July | 24° / 17° | 6 | 26 | 0 | 93 mm | Perfect | Bayonne in July |
| August | 25° / 17° | 5 | 26 | 0 | 96 mm | Perfect | Bayonne in August |
| September | 23° / 16° | 5 | 26 | 0 | 86 mm | Perfect | Bayonne in September |
| October | 20° / 13° | 6 | 25 | 0 | 111 mm | Good | Bayonne in October |
| November | 15° / 10° | 10 | 20 | 0 | 209 mm | Ok | Bayonne in November |
| December | 12° / 8° | 9 | 22 | 1 | 146 mm | Bad | Bayonne in December |