Click on a day for an hourly weather forecast
The temperatures in Jefferson City in September are comfortable with low of 15°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Jefferson City 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 Jefferson City in September 2025.
If you’re planning to visit Jefferson City in the near future, we highly recommend that you review the 14 day weather forecast for Jefferson City before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -5° | 4 | 19 | 8 | 36 mm | Awful | Jefferson City in January |
| February | 5° / -3° | 4 | 16 | 8 | 41 mm | Awful | Jefferson City in February |
| March | 13° / 3° | 6 | 23 | 3 | 62 mm | Bad | Jefferson City in March |
| April | 18° / 7° | 6 | 24 | 1 | 84 mm | Good | Jefferson City in April |
| May | 24° / 13° | 7 | 24 | 0 | 97 mm | Good | Jefferson City in May |
| June | 30° / 18° | 7 | 23 | 0 | 79 mm | Ok | Jefferson City in June |
| July | 32° / 20° | 6 | 25 | 0 | 67 mm | Good | Jefferson City in July |
| August | 31° / 18° | 4 | 27 | 0 | 68 mm | Good | Jefferson City in August |
| September | 27° / 15° | 4 | 26 | 0 | 58 mm | Perfect | Jefferson City in September |
| October | 19° / 9° | 4 | 27 | 0 | 61 mm | Good | Jefferson City in October |
| November | 12° / 3° | 3 | 26 | 1 | 41 mm | Ok | Jefferson City in November |
| December | 7° / -1° | 3 | 23 | 5 | 35 mm | Bad | Jefferson City in December |