Click on a day for an hourly weather forecast
The temperatures in Terni in May are quite cold with temperatures between 8°C and 22°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Terni. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Terni in May 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 |