Click on a day for an hourly weather forecast
The temperatures in Buffalo in September are comfortable with low of 13°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Buffalo 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 Buffalo in September 2025.
If you’re planning to visit Buffalo in the near future, we highly recommend that you review the 14 day weather forecast for Buffalo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 6 | 4 | 22 | 107 mm | Awful | Buffalo in January |
| February | -1° / -7° | 7 | 2 | 21 | 115 mm | Awful | Buffalo in February |
| March | 5° / -3° | 10 | 8 | 14 | 116 mm | Awful | Buffalo in March |
| April | 11° / 3° | 10 | 14 | 7 | 136 mm | Awful | Buffalo in April |
| May | 19° / 9° | 9 | 22 | 1 | 140 mm | Ok | Buffalo in May |
| June | 23° / 14° | 8 | 22 | 0 | 154 mm | Good | Buffalo in June |
| July | 26° / 17° | 8 | 23 | 0 | 141 mm | Good | Buffalo in July |
| August | 26° / 17° | 6 | 25 | 0 | 133 mm | Perfect | Buffalo in August |
| September | 22° / 13° | 6 | 24 | 0 | 109 mm | Good | Buffalo in September |
| October | 15° / 8° | 10 | 20 | 1 | 140 mm | Ok | Buffalo in October |
| November | 7° / 2° | 9 | 11 | 10 | 107 mm | Awful | Buffalo in November |
| December | 2° / -2° | 8 | 6 | 19 | 126 mm | Awful | Buffalo in December |