Best time to visit Trieste
Italy · 20-year averages
June is the best month in Trieste, scoring 78 out of 100, with January the weakest at 44. The 34-point spread means timing is worth planning around without being decisive. The good window runs April to October — 7 months within ten points of the best.
August is the warmest month at 28.7 °C and January the coolest at 7.8 °C — a 20.9 °C spread across the year. 14 nights a year dip below freezing.
Rain is spread evenly through the year — between 9 and 13 wet days in every month — so there is no dry season to aim for and no wet one to dodge. Whatever you plan, the odds of rain are much the same.
Daylight runs from 8.7 hours in winter to 15.7 in summer, enough to notice on a sightseeing itinerary.
The three strongest months are June, September, May. The one to think twice about is January. Each month below has its own page with rainfall reliability, extremes, daylight and crowd levels.
Trieste month by month
| Month | High °C | Low °C | Rain days | Daylight h | Score | Verdict |
|---|---|---|---|---|---|---|
| January | 7.8 | 3 | 9 | 9.1 | 44 | A hard month |
| February | 9 | 3.3 | 10 | 10.4 | 45 | A hard month |
| March | 12.9 | 5.9 | 10 | 11.8 | 58 | Shoulder season |
| April | 17.4 | 9.9 | 11 | 13.5 | 71 | A good month |
| May | 21.6 | 14.3 | 13 | 14.9 | 75 | A good month |
| June | 25.8 | 18.7 | 12 | 15.7 | 78 | Prime time |
| July | 28.5 | 20.9 | 11 | 15.4 | 73 | A good month |
| August | 28.7 | 20.7 | 11 | 14.2 | 71 | A good month |
| September | 24 | 16.6 | 11 | 12.6 | 77 | A good month |
| October | 19.2 | 12.6 | 11 | 11 | 74 | A good month |
| November | 13.9 | 8.7 | 12 | 9.5 | 56 | Shoulder season |
| December | 9.4 | 4.5 | 10 | 8.7 | 46 | A hard month |
Planning the rest of the trip
- Flight time to Trieste how long you are actually in the air
- Trieste time zone and the difference from home
- Days until your trip count down to the departure date