Click on a day for an hourly weather forecast
The temperatures in Opava in September are usually low and can range between 10°C and 19°C.
You can expect about 3 to 8 days of rain in Opava 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 Opava in September 2026.
If you’re planning to visit Opava in the near future, we highly recommend that you review the 14 day weather forecast for Opava before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -4° | 7 | 8 | 17 | 57 mm | Awful | Opava in January |
| February | 2° / -3° | 6 | 10 | 13 | 59 mm | Awful | Opava in February |
| March | 8° / 1° | 6 | 18 | 7 | 60 mm | Bad | Opava in March |
| April | 14° / 4° | 6 | 21 | 3 | 64 mm | Ok | Opava in April |
| May | 18° / 8° | 8 | 22 | 0 | 121 mm | Ok | Opava in May |
| June | 22° / 12° | 8 | 22 | 0 | 122 mm | Ok | Opava in June |
| July | 24° / 14° | 8 | 23 | 0 | 128 mm | Good | Opava in July |
| August | 24° / 14° | 5 | 26 | 0 | 103 mm | Perfect | Opava in August |
| September | 19° / 10° | 5 | 25 | 0 | 92 mm | Good | Opava in September |
| October | 13° / 6° | 6 | 25 | 1 | 84 mm | Ok | Opava in October |
| November | 8° / 3° | 5 | 21 | 4 | 50 mm | Bad | Opava in November |
| December | 2° / -2° | 7 | 14 | 11 | 52 mm | Awful | Opava in December |