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Trieste Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Trieste.
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10-day forecastForecast
Climate overview of Trieste
Trieste, Friuli Venezia Giulia, Italy, experiences significant temperature variation throughout the year. Summers bring daytime highs of 28°C (82°F) in August, while winters cool to 8°C (46°F) in January.
With around 1494 mm (59 in) of annual rain/snowfall, Trieste has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has warm summers and cold winters. The wettest month is November. The sunniest month is July, with 9.7 hours of sunshine per day on average.
Trieste Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Trieste - and find the best time to visit.
Monthly Temperature in Trieste
Depending on the time of the year, temperatures range from comfortable to chilly in Trieste. Average daytime temperatures reach a comfortable 28°C (82°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 8°C (46°F).
At night, temperatures range from around 19°C (66°F) in August to 2°C (36°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Trieste
Trieste has a relatively rain/snowy climate with high precipitation levels, averaging 1494 mm (59 in) of rain/snowfall annually. Trieste can be quite wet during November, receiving approximately 188 mm (7.4 in) of precipitation over 13 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 83 mm (3.3 in) of precipitation spread across 12 rainy days. For more details, please visit our Trieste Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Trieste
Trieste can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.7 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Triest, Italy (2 KM, 1 Miles).
Daily hours of sunshine
Data from: Triest, Italy (2 KM, 1 Miles).
Daily percentage of sunshine
Data from: Triest, Italy (2 KM, 1 Miles).
Water Temperature in Trieste
The mean water temperature over the year ranges from 9°C (48°F) in February to 24°C (75°F) in August.
Water temperature over the year
Data from: Triest, Italy (2 KM, 1 Miles).
Humidity in Trieste by Month
The relative humidity is high throughout the year in Trieste.
The city experiences its highest humidity in October, reaching 69%. In March, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Triest, Italy (2 KM, 1 Miles).
Best Time to Visit Trieste
For comfortable weather, consider visiting Trieste in July. Conditions are usually least favourable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
wet
Mar
wet
Apr
mixed
May
very good
Jun
very good
Jul
excellent
Aug
very good
Sep
very good
Oct
good
Nov
wet
Dec
wet
- Best overall: July
- Warmest weather: July and August
- Most sunshine: July
- Best for swimming: June, July, August and September.
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Trieste
What is the best time to visit Trieste?
July typically offers the most optimal weather in Trieste. In contrast, January, February, March, November and December tend to have less optimal conditions. Trieste has warm summers and cold winters.
What temperatures can I expect in Trieste?
Daytime highs range from 8°C (46°F) in January to 28°C (82°F) in August. Nighttime lows range from 2°C (36°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Trieste get?
Annual rainfall is around 1494 mm (59 in). November is the wettest month with 188 mm (7.4 in), while July is the driest with 83 mm (3.3 in).
How sunny is Trieste?
Trieste receives around 2,117 hours of sunshine per year. July is the sunniest month with 290 hours, while December is the cloudiest with just 84 hours. Overall, Trieste enjoys abundant sunshine.
Trieste 3-Day Forecast
Trieste on the map
Trieste is highlighted - select any city to see its climate.
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Where to go in October - average daytime high across popular destinations.
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