Weather in Trieste in August 2025
- August is usually the hottest month of the year in Trieste;
Average weather
Average temperature in Trieste in August
Going from a maximum of +35°C during the day to a minimum of +17°C during the night, the temperature in August averages around +30°C.
The average maximum temperature goes down 22% by the end of the month, compared with the beginning of the month, from +29°C to +25°C.
Is Trieste warm or cold in August?
Trieste is typically warm in August.
Maximum temperatures go up compared to the previous month from +29°C to +29°C. The minimum temperature also goes up from +20°C to +20°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Trieste, here is the comparison with other months:
Water temperature in Trieste in August
Water in Trieste in August is Comfortable. It varies from +22°C to +28°C, with an average of +25°C. This is almost similar to the air temperature, which averages +29°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Trieste in August?
Climate in Trieste in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +29°C | +24°C | ||||
| Min. temperature | ||||||
| +10°C | +8°C | +6°C | ||||
| Max. temperature | ||||||
| +39°C | +37°C | +32°C | ||||
| Rainfall | ||||||
| 72 mm | 101 mm | 152 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Avg. water temperature | ||||||
| +25°C | +25°C | +23°C | ||||
| Humidity | ||||||
| 64% | 64% | 67% | ||||
| Air pressure | ||||||
| 1013 HPa | 1013 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 12 | 14 | 11 | ||||
| Cloudy days | ||||||
| 5 | 4 | 5 | ||||
| Rainy days | ||||||
| 8 | 9 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +29°C for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 72 mm to 101 mm. Humidity levels don’t change as the month goes on, averaging around 64%. The average wind speed doesn’t change much during August, staying around 1 m/s. The good news is there are likely to be more sunny days in August, from 12 to 14.
September brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Trieste is gradually increasing during August, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Trieste?
Climate Change over Years
The climate in Trieste in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2022 (+20°C). The driest year was 2003 with only 712 mm of rainfall, and the wettest year was 2019 with 2509 mm.
FAQ
Is August a good time to visit Trieste?
Can you sunbathe in Trieste in August?
Can you swim in Trieste in August?
Is Trieste rainy in August?
Is it sunny in Trieste in August?
Other cities in Italy
Monthly weather in Trieste
Source of the data
For this page, we’ve looked at the typical weather in Trieste, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.