Click on a day for an hourly weather forecast
The temperatures in Marion in September are comfortable with low of 13°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Marion 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 Marion in September 2025.
If you’re planning to visit Marion in the near future, we highly recommend that you review the 14 day weather forecast for Marion before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -7° | 6 | 8 | 17 | 104 mm | Awful | Marion in January |
| February | 1° / -6° | 6 | 7 | 15 | 104 mm | Awful | Marion in February |
| March | 8° / 0° | 9 | 13 | 9 | 131 mm | Awful | Marion in March |
| April | 14° / 5° | 10 | 17 | 3 | 161 mm | Bad | Marion in April |
| May | 21° / 12° | 10 | 21 | 0 | 179 mm | Ok | Marion in May |
| June | 25° / 16° | 9 | 21 | 0 | 184 mm | Good | Marion in June |
| July | 27° / 17° | 9 | 22 | 0 | 165 mm | Good | Marion in July |
| August | 26° / 16° | 7 | 24 | 0 | 138 mm | Good | Marion in August |
| September | 23° / 13° | 6 | 24 | 0 | 109 mm | Perfect | Marion in September |
| October | 17° / 8° | 6 | 24 | 1 | 120 mm | Good | Marion in October |
| November | 9° / 2° | 7 | 18 | 5 | 107 mm | Awful | Marion in November |
| December | 3° / -2° | 8 | 11 | 12 | 102 mm | Awful | Marion in December |