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Trieste in August: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Trieste in August will be like? Take a look at our weather guide for Trieste, based on historical data.
Check flight prices to Trieste on Avionero:
August

Weather in Trieste in August 2025

Good Weather
Warm
☀️
Sunny
🌊
Comfortable water
Planning a trip to Trieste in August? You are in luck! The weather is generally good, with an average maximum temperature of +84°F and approximately 14 sunny days. Just be prepared for some rain, as there are usually around 9 rainy days and 101 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.
Good to know:
  • August is usually the hottest month of the year in Trieste;

Average weather

☀️
+84°F
Avg. max. temperature
+46°F
Min.
+99°F
Max.
101 mm
Total precipitation
64%
Avg. humidity
1 m/s
Avg. wind
14 ☀️
Sunny Days
4 ⛅️
Cloudy
9 🌦
Rainy
Our opinion: Trieste has good weather in August.

Average temperature in Trieste in August

Here are the expected maximum, average and minimum temperatures in Trieste for August based on the historical data.
Last Year
Historical Data

Going from a maximum of +95°F during the day to a minimum of +63°F during the night, the temperature in August averages around +86°F.

The average maximum temperature goes down 22% by the end of the month, compared with the beginning of the month, from +84°F to +77°F.

Is Trieste warm or cold in August?

Trieste is typically warm in August.

Maximum temperatures go up compared to the previous month from +84°F to +84°F. The minimum temperature also goes up from +68°F to +68°F.

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 +72°F to +82°F, with an average of +77°F. This is almost similar to the air temperature, which averages +84°F.

The water temperature in August is one of the warmest of the entire year:

The warmest water temperatures in Trieste are reached in August, when the average sea temperature rises to +77°F. The coldest water temperatures are in February, with an average of +49°F.

Can you swim in Trieste in August?

The water in Trieste in August is pretty comfortable (+77°F in average). Ideal for swimming, especially in outdoor pools and open water. Suitable for recreational and casual swimmers.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don’t forget a large beach towel or two for drying off.

Climate in Trieste in August

Trieste weather looks like this, on average, in August and the surrounding months.
JulyAugustSeptember
Avg. temperature
+84°F+84°F+75°F
Min. temperature
+50°F+46°F+43°F
Max. temperature
+102°F+99°F+90°F
Rainfall
72 mm101 mm152 mm
Wind
1 m/s1 m/s1 m/s
Avg. water temperature
+77°F+77°F+74°F
Humidity
64%64%67%
Air pressure
1013 HPa1013 HPa1015 HPa
Sunny days
121411
Cloudy days
545
Rainy days
8910
Snowy days
000

August weather is still as good as in July. The temperature levels stay the same in the area of +84°F 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

Wind speed in Trieste in August based on historical data.
Last Year
Historical Data

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

Amount of rainfall in mm during August in Trieste based on historical data.
Last Year
Historical Data
Typically, there is a 42% chance of rain on an average day in August, with total rainfall of approximately 279 mm. The maximum amount of rainfall per day is around 76 mm, which is considered heavy rain. August is a pretty wet month with over 13 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how August is compared with other months in the amount of precipitation, total mm:
Trieste wettest month is November, where a typical day has a 43% chance of precipitation and 163 mm of rainfall per day. July, on the other hand, is the driest month with a mere 26% chance of precipitation and 72 mm of rainfall per day.

How was the weather last August in Trieste?

This is the weather in Trieste in August 2023:
1 August
🌧️
+83°F
2 August
☀️
+84°F
3 August
🌧️
+87°F
4 August
🌧️
+78°F
5 August
🌧️
+73°F
6 August
🌧️
+76°F
7 August
☀️
+78°F
8 August
☀️
+78°F
9 August
☀️
+80°F
10 August
☁️
+82°F
11 August
☀️
+83°F
12 August
☀️
+86°F
13 August
☁️
+90°F
14 August
☀️
+88°F
15 August
☀️
+89°F
16 August
☀️
+90°F
17 August
☀️
+89°F
18 August
☀️
+89°F
19 August
☀️
+91°F
20 August
☀️
+92°F
21 August
☀️
+94°F
22 August
☀️
+95°F
23 August
☁️
+94°F
24 August
☁️
+95°F
25 August
☀️
+94°F
26 August
☀️
+93°F
27 August
☁️
+92°F
28 August
🌧️
+83°F
29 August
🌧️
+74°F
30 August
🌧️
+68°F
31 August
☁️
+77°F
In August 2023 Trieste had 17 sunny days, 6 cloudy days, and 8 rainy days. The average maximum temperature was +86°F, with an absolute maximum of +95°F and a minimum of +68°F. The average humidity was 77%, with a maximum of 96% and a minimum of 49%. The average wind speed was 2 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in August?

Climate Change Over the Years

This is how Trieste climate has changed over the last 43 years.

The climate in Trieste in August has not changed that much over the last 43 years.

The average temperature was the lowest in 1980 (+63°F) and the highest in 2022 (+69°F). The driest year was 2003 with only 712 mm of rainfall, and the wettest year was 2019 with 2509 mm.

FAQ

Frequently asked questions about the weather in Trieste in August:

Is August a good time to visit Trieste?

August is a really good time to go to Trieste. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Trieste.

Can you sunbathe in Trieste in August?

August is warm in Trieste. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Trieste in August?

Yes, the water temperature in Trieste in August is considered moderate and enjoyable for most people, averaging around +77°F.

Is Trieste rainy in August?

Trieste is often rainy in August. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Trieste in August?

The amount of sunny days in Trieste during August varies; prepare for a mix of clouds and sun.

Other cities in Italy

Check out the weather for 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.