Climate averages 1991–2020
Trieste weather
in August.
A warm, wet month: the warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Trieste: daytime highs average 27.7°C and nights cool to about 18.9°C. By daytime temperature it is the warmest month of the year.
Expect about 111 mm of rain on roughly 10 days, which makes August a wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 07 min on an average August day.
The nearest other city in this atlas is Udine (63 km away). In August its highs average 26.5°C, 1.2°C cooler than Trieste, with 96 mm of rain.
Among the 79 cities listed in Italy, Trieste ranks joint 64th of 79 for the warmest August highs and 73rd of 79 for the driest August (rainfall, lowest first). The mean August high of those 79 cities is 29.1°C; Trieste is 1.4°C cooler than that mean.
From August to September, average highs fall by 5.3°C to 22.3°C, and monthly rainfall rises from 111 mm to 170 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Udine in AugustItaly · 63 kmHigh 26.5°C · Low 16.5°C · 96 mm rain
- Rijeka in AugustCroatia · 63 kmHigh 27.9°C · Low 19.0°C · 90 mm rain
- Ljubljana in AugustSlovenia · 72 kmHigh 25.2°C · Low 15.9°C · 112 mm rain
- Klagenfurt am Wörthersee in AugustAustria · 116 kmHigh 24.1°C · Low 15.3°C · 152 mm rain
- Treviso in AugustItaly · 119 kmHigh 27.9°C · Low 18.1°C · 81 mm rain
- Mestre in AugustItaly · 120 kmHigh 27.9°C · Low 19.6°C · 83 mm rain
- Padua in AugustItaly · 150 kmHigh 28.8°C · Low 19.2°C · 80 mm rain
- Zagreb in AugustCroatia · 172 kmHigh 27.4°C · Low 17.3°C · 81 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.