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The weather in Terni in August is hot. The average temperatures are between 15°C and 32°C. Usually the days in August are hot while the nights are a bit cooler.
You can expect about 3 to 8 days of rain in Terni during the month of August. 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 Terni in August 2026.
If you’re planning to visit Terni in the near future, we highly recommend that you review the 14 day weather forecast for Terni before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / -1° | 6 | 25 | 1 | 83 mm | Ok | Terni in January |
| February | 11° / 0° | 5 | 21 | 2 | 88 mm | Bad | Terni in February |
| March | 15° / 2° | 5 | 26 | 0 | 79 mm | Good | Terni in March |
| April | 19° / 5° | 5 | 25 | 0 | 68 mm | Good | Terni in April |
| May | 22° / 8° | 8 | 23 | 0 | 98 mm | Ok | Terni in May |
| June | 27° / 11° | 6 | 24 | 0 | 82 mm | Perfect | Terni in June |
| July | 32° / 14° | 4 | 27 | 0 | 57 mm | Good | Terni in July |
| August | 32° / 15° | 3 | 28 | 0 | 46 mm | Good | Terni in August |
| September | 27° / 12° | 4 | 26 | 0 | 68 mm | Perfect | Terni in September |
| October | 21° / 8° | 3 | 28 | 0 | 67 mm | Good | Terni in October |
| November | 16° / 5° | 6 | 24 | 0 | 99 mm | Good | Terni in November |
| December | 11° / 1° | 4 | 26 | 1 | 95 mm | Ok | Terni in December |