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The temperatures in Cincinnati in September are comfortable with low of 14°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Cincinnati 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 Cincinnati in September 2025.
If you’re planning to visit Cincinnati in the near future, we highly recommend that you review the 14 day weather forecast for Cincinnati before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -5° | 7 | 12 | 12 | 106 mm | Awful | Cincinnati in January |
| February | 5° / -4° | 8 | 10 | 11 | 123 mm | Awful | Cincinnati in February |
| March | 11° / 2° | 8 | 17 | 6 | 133 mm | Awful | Cincinnati in March |
| April | 17° / 6° | 9 | 20 | 2 | 179 mm | Bad | Cincinnati in April |
| May | 23° / 12° | 10 | 21 | 0 | 180 mm | Good | Cincinnati in May |
| June | 28° / 16° | 7 | 23 | 0 | 166 mm | Good | Cincinnati in June |
| July | 29° / 18° | 9 | 22 | 0 | 162 mm | Ok | Cincinnati in July |
| August | 29° / 17° | 7 | 24 | 0 | 124 mm | Ok | Cincinnati in August |
| September | 26° / 14° | 6 | 24 | 0 | 107 mm | Perfect | Cincinnati in September |
| October | 19° / 8° | 6 | 25 | 0 | 112 mm | Good | Cincinnati in October |
| November | 11° / 2° | 6 | 21 | 3 | 104 mm | Bad | Cincinnati in November |
| December | 6° / -1° | 8 | 14 | 9 | 125 mm | Awful | Cincinnati in December |