Click on a day for an hourly weather forecast
The temperatures in Erie in September are comfortable with low of 12°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Erie 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 Erie in September 2025.
If you’re planning to visit Erie in the near future, we highly recommend that you review the 14 day weather forecast for Erie before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -8° | 6 | 2 | 24 | 158 mm | Awful | Erie in January |
| February | -1° / -8° | 6 | 3 | 21 | 148 mm | Awful | Erie in February |
| March | 5° / -3° | 9 | 9 | 14 | 147 mm | Awful | Erie in March |
| April | 11° / 2° | 11 | 12 | 7 | 176 mm | Awful | Erie in April |
| May | 19° / 9° | 9 | 21 | 1 | 170 mm | Ok | Erie in May |
| June | 23° / 13° | 9 | 21 | 0 | 186 mm | Good | Erie in June |
| July | 25° / 15° | 8 | 23 | 0 | 165 mm | Good | Erie in July |
| August | 25° / 15° | 7 | 24 | 0 | 147 mm | Good | Erie in August |
| September | 22° / 12° | 7 | 23 | 0 | 148 mm | Ok | Erie in September |
| October | 15° / 7° | 11 | 19 | 1 | 178 mm | Ok | Erie in October |
| November | 7° / 1° | 8 | 11 | 11 | 138 mm | Awful | Erie in November |
| December | 2° / -3° | 7 | 5 | 19 | 177 mm | Awful | Erie in December |