Click on a day for an hourly weather forecast
The temperatures in Charlottetown in September are usually low and can range between 14°C and 18°C.
You can expect about 3 to 8 days of rain in Charlottetown 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 Charlottetown in September 2025.
If you’re planning to visit Charlottetown in the near future, we highly recommend that you review the 14 day weather forecast for Charlottetown before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -8° | 7 | 5 | 19 | 132 mm | Awful | Charlottetown in January |
| February | -3° / -9° | 7 | 4 | 18 | 149 mm | Awful | Charlottetown in February |
| March | -1° / -5° | 8 | 8 | 16 | 104 mm | Awful | Charlottetown in March |
| April | 5° / 1° | 9 | 14 | 7 | 110 mm | Awful | Charlottetown in April |
| May | 10° / 5° | 9 | 22 | 1 | 115 mm | Bad | Charlottetown in May |
| June | 16° / 11° | 7 | 23 | 0 | 144 mm | Ok | Charlottetown in June |
| July | 20° / 16° | 6 | 25 | 0 | 132 mm | Good | Charlottetown in July |
| August | 22° / 17° | 5 | 26 | 0 | 133 mm | Good | Charlottetown in August |
| September | 18° / 14° | 6 | 24 | 0 | 123 mm | Good | Charlottetown in September |
| October | 12° / 9° | 8 | 23 | 0 | 142 mm | Bad | Charlottetown in October |
| November | 7° / 3° | 10 | 14 | 7 | 168 mm | Awful | Charlottetown in November |
| December | 1° / -2° | 10 | 6 | 15 | 163 mm | Awful | Charlottetown in December |