Climate averages 1991–2020
Trieste weather
in May.
A mild, wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Trieste: daytime highs average 20.6°C and nights cool to about 12.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 122 mm of rain on roughly 13 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 53 min on an average May day.
The nearest other city in this atlas is Udine (63 km away). In May its highs average 20.0°C, 0.7°C cooler than Trieste, with 115 mm of rain.
Among the 79 cities listed in Italy, Trieste ranks joint 69th of 79 for the warmest May highs and 73rd of 79 for the driest May (rainfall, lowest first). The mean May high of those 79 cities is 21.8°C; Trieste is 1.1°C cooler than that mean.
From May to June, average highs rise by 4.1°C to 24.8°C, and monthly rainfall falls from 122 mm to 111 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Trieste climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C1.1°C | 1.1°C | 90 | 9.5 | 9.19 h |
| February | 8.6°C1.1°C | 1.1°C | 97 | 8.7 | 10.310 h |
| March | 12.4°C4.1°C | 4.1°C | 101 | 9.7 | 11.912 h |
| April | 16.4°C7.8°C | 7.8°C | 110 | 12.1 | 13.513 h |
| May, selected | 20.6°C12.3°C | 12.3°C | 122 | 13.0 | 14.915 h |
| June | 24.8°C16.4°C | 16.4°C | 111 | 12.1 | 15.616 h |
| July | 27.4°C18.7°C | 18.7°C | 87 | 10.7 | 15.315 h |
| August | 27.7°C18.9°C | 18.9°C | 111 | 10.2 | 14.114 h |
| September | 22.3°C14.8°C | 14.8°C | 170 | 11.4 | 12.613 h |
| October | 17.4°C10.8°C | 10.8°C | 184 | 13.0 | 11.011 h |
| November | 12.3°C6.5°C | 6.5°C | 195 | 13.2 | 9.510 h |
| December | 8.0°C2.0°C | 2.0°C | 129 | 10.1 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Udine in MayItaly · 63 kmHigh 20.0°C · Low 10.2°C · 115 mm rain
- Rijeka in MayCroatia · 63 kmHigh 20.7°C · Low 12.6°C · 120 mm rain
- Ljubljana in MaySlovenia · 72 kmHigh 19.3°C · Low 9.7°C · 103 mm rain
- Klagenfurt am Wörthersee in MayAustria · 116 kmHigh 18.9°C · Low 9.4°C · 119 mm rain
- Treviso in MayItaly · 119 kmHigh 21.4°C · Low 11.7°C · 114 mm rain
- Mestre in MayItaly · 120 kmHigh 21.3°C · Low 13.0°C · 93 mm rain
- Padua in MayItaly · 150 kmHigh 22.1°C · Low 12.4°C · 97 mm rain
- Zagreb in MayCroatia · 172 kmHigh 21.2°C · Low 10.8°C · 87 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Trieste) is explained once on the Trieste year overview and on the Sources, method and limits page.