Click on a day for an hourly weather forecast
The temperatures in Chillicothe 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 Chillicothe 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 Chillicothe in September 2025.
If you’re planning to visit Chillicothe in the near future, we highly recommend that you review the 14 day weather forecast for Chillicothe before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -5° | 7 | 12 | 12 | 84 mm | Awful | Chillicothe in January |
| February | 4° / -4° | 6 | 12 | 11 | 107 mm | Awful | Chillicothe in February |
| March | 11° / 2° | 8 | 17 | 6 | 115 mm | Awful | Chillicothe in March |
| April | 17° / 6° | 7 | 22 | 1 | 126 mm | Ok | Chillicothe in April |
| May | 23° / 12° | 9 | 22 | 0 | 143 mm | Good | Chillicothe in May |
| June | 27° / 16° | 8 | 22 | 0 | 128 mm | Good | Chillicothe in June |
| July | 29° / 18° | 8 | 23 | 0 | 130 mm | Ok | Chillicothe in July |
| August | 29° / 17° | 6 | 25 | 0 | 93 mm | Good | Chillicothe in August |
| September | 26° / 14° | 5 | 26 | 0 | 86 mm | Perfect | Chillicothe in September |
| October | 19° / 8° | 5 | 26 | 0 | 84 mm | Good | Chillicothe in October |
| November | 11° / 2° | 5 | 23 | 2 | 78 mm | Bad | Chillicothe in November |
| December | 6° / -1° | 7 | 15 | 9 | 107 mm | Awful | Chillicothe in December |