Click on a day for an hourly weather forecast
The temperatures in Atlantic in September are comfortable with low of 19°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Atlantic 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 Atlantic in September 2025.
If you’re planning to visit Atlantic in the near future, we highly recommend that you review the 14 day weather forecast for Atlantic before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / 0° | 5 | 20 | 6 | 55 mm | Awful | Atlantic in January |
| February | 5° / 0° | 6 | 17 | 5 | 74 mm | Awful | Atlantic in February |
| March | 8° / 4° | 7 | 22 | 3 | 75 mm | Awful | Atlantic in March |
| April | 13° / 8° | 5 | 25 | 0 | 60 mm | Ok | Atlantic in April |
| May | 18° / 14° | 5 | 26 | 0 | 76 mm | Good | Atlantic in May |
| June | 23° / 19° | 4 | 26 | 0 | 74 mm | Perfect | Atlantic in June |
| July | 27° / 22° | 5 | 26 | 0 | 89 mm | Perfect | Atlantic in July |
| August | 27° / 22° | 4 | 27 | 0 | 102 mm | Perfect | Atlantic in August |
| September | 24° / 19° | 4 | 26 | 0 | 75 mm | Perfect | Atlantic in September |
| October | 18° / 14° | 5 | 26 | 0 | 88 mm | Good | Atlantic in October |
| November | 12° / 8° | 4 | 25 | 1 | 54 mm | Ok | Atlantic in November |
| December | 8° / 4° | 6 | 22 | 3 | 83 mm | Bad | Atlantic in December |