Click on a day for an hourly weather forecast
The temperatures in Rieti in September are quite cold with temperatures between 9°C and 25°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rieti 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 Rieti in September 2026.
If you’re planning to visit Rieti in the near future, we highly recommend that you review the 14 day weather forecast for Rieti before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / -2° | 7 | 22 | 2 | 103 mm | Awful | Rieti in January |
| February | 10° / -1° | 7 | 18 | 3 | 110 mm | Awful | Rieti in February |
| March | 13° / 0° | 7 | 24 | 1 | 103 mm | Bad | Rieti in March |
| April | 17° / 3° | 7 | 23 | 0 | 92 mm | Ok | Rieti in April |
| May | 21° / 6° | 10 | 21 | 0 | 139 mm | Ok | Rieti in May |
| June | 26° / 9° | 8 | 22 | 0 | 122 mm | Good | Rieti in June |
| July | 30° / 12° | 5 | 26 | 0 | 78 mm | Good | Rieti in July |
| August | 30° / 12° | 5 | 26 | 0 | 77 mm | Good | Rieti in August |
| September | 25° / 9° | 6 | 24 | 0 | 97 mm | Perfect | Rieti in September |
| October | 20° / 6° | 5 | 26 | 0 | 87 mm | Good | Rieti in October |
| November | 14° / 3° | 6 | 23 | 1 | 132 mm | Good | Rieti in November |
| December | 10° / -1° | 5 | 25 | 2 | 115 mm | Bad | Rieti in December |