Click on a day for an hourly weather forecast
The temperatures in Trieste in May are comfortable with low of 11°C and and high up to 21°C.
You can expect rain for roughly half of the month of May in Trieste. 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 Trieste in May 2025.
If you’re planning to visit Trieste in the near future, we highly recommend that you review the 14 day weather forecast for Trieste before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 0° | 8 | 22 | 2 | 154 mm | Awful | Trieste in January |
| February | 9° / 1° | 8 | 18 | 2 | 204 mm | Awful | Trieste in February |
| March | 12° / 3° | 8 | 22 | 1 | 161 mm | Bad | Trieste in March |
| April | 17° / 8° | 7 | 23 | 0 | 143 mm | Ok | Trieste in April |
| May | 21° / 11° | 11 | 20 | 0 | 219 mm | Ok | Trieste in May |
| June | 25° / 16° | 10 | 20 | 0 | 206 mm | Good | Trieste in June |
| July | 28° / 19° | 8 | 23 | 0 | 166 mm | Good | Trieste in July |
| August | 28° / 20° | 7 | 24 | 0 | 148 mm | Good | Trieste in August |
| September | 24° / 15° | 9 | 21 | 0 | 240 mm | Good | Trieste in September |
| October | 18° / 10° | 7 | 24 | 0 | 198 mm | Ok | Trieste in October |
| November | 13° / 6° | 10 | 20 | 0 | 272 mm | Bad | Trieste in November |
| December | 9° / 2° | 8 | 22 | 1 | 224 mm | Bad | Trieste in December |