Trieste weather in July

July in Trieste: hot, rainy — a great time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Trieste🇮🇹 Italy · Northern Italy · City76
  1. 61Jan
  2. 65Feb
  3. 73Mar
  4. 84Apr
  5. 86May
  6. 81Jun
  7. 76Jul
  8. 74Aug
  9. 80Sep
  10. 78Oct
  11. 64Nov
  12. 60Dec

#6 of 12 months in Trieste · #806 of 1413 destinations to visit in July · comfort 76/100 (tier B)

Days
30°C
Nights
21°C
Wet days
11
Sun
13 h
Humidity
68%
Daylight
15 h
Trieste, Italy
Photo: Ana Kenk · Pexels

Traveller notes on Trieste in July

Notes from nearby Piran (21 km away)

Trieste doesn't have its own notes for July yet — these are about Piran, close enough to share the season.

Forum posters describe Piran's summer as sunny and hot with a cooling sea breeze, part of what they call a submediterranean climate - more stable and predictable than the continental weather found inland in places like Bled. A shower or thunderstorm is always possible, but posters are clear that sustained multi-day rain is unlikely, with conditions bouncing back to sun quickly after a storm passes. July counts as peak season alongside August, so warm, mostly sunny days come paired with the year's biggest crowds.
Tripadvisor community · July · 1 month ago · about Piran · Read more on Tripadvisor ↗

Other months in Trieste

Forum posters describe temperatures around Trieste dropping drastically toward the 5C range by late autumn, a pattern that should deepen further into December, and flag the city's famous bora wind - a strong, cold gust off the Adriatic from the north - as a defining feature of the cold season, bringing chilly air alongside strikingly clear blue skies. One visitor recalled being essentially alone in the city's main square on a bora-windy day even outside deep winter, illustrating how dramatically the wind can empty the streets. Posters discussing Italy generally note that December weather varies a lot by region, milder near lakes and the sea but colder and wetter elsewhere - Trieste's northern Adriatic coastal position, paired with the bora, likely makes it a colder, windier exception to Italy's coastal-mild reputation. Posters generally recommend serious wind-resistant layers for a December visit to Trieste.
Tripadvisor community · December · 1 month ago · Read more on Tripadvisor ↗
Forum posters planning June visits to Trieste generally hope for good weather rather than reporting a firm guarantee either way, reflecting real day-to-day variability typical of northern Italy in early summer. Posters discussing Italy more broadly in June describe conditions as capable of turning genuinely hot and humid, especially as the month progresses toward the high season - a pattern that should apply to Trieste's own Adriatic coastal setting as much as inland Italian cities. Posters consistently recommend June as a good window for exploring Trieste's historic sites, including Miramare Castle and the Roman Theatre, positioning the month as comfortably ahead of peak summer crowds and heat while still offering reliably warm, walkable conditions.
Tripadvisor community · June · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Trieste's card on the map.

Trieste climate normals — July

Daytime high30°C / 86°F🥵 hot
Nighttime low21°C / 70°F
Feels like (high)32°C / 90°F
Sea temperature27°C / 80°F😎 warm sea
Rainfall93 mm / 3.7 in🌧 rainy
Rainy days11 days
Humidity68%💧 humid
Dew point18°C / 64°F
Sunshine13 h/day
Daylight15.3 h
Wind14 km/h / 9 mph
Air quality (US AQI)55🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Trieste in July

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusySummer holidays in Italy, school holidays in 6 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Trieste's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherTrieste's weather peaks April–June, best around May.

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Best weatherFair weatherToughest weather

What's on in Trieste in July

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Sea warm enough

    20 Jun – 20 Sep · usually

    The gulf is shallow and warms well, and the swimming is off concrete platforms and the Barcola strip rather than sand. The Pedocin, the last beach in Europe split by a wall between men and women, is here.

What's on around the world in July →

Nearby, and something's on

Within 300 km of Trieste — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Trieste?

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Trieste in July — FAQ

Is July a good time to visit Trieste?
July in Trieste: hot, rainy — a great time to visit. It ranks #6 of 12 months for Trieste on SeasonMap's comfort score (76/100).
What is the weather like in Trieste in July?
In July, Trieste averages a daily high of 29.8°C and a low of 21.2°C, with about 93.4 mm of rain over roughly 11.2 rainy days.
What is the air quality in Trieste in July?
Trieste has a mean US Air Quality Index of about 55 in July.

Within 300 km: Ljubljana's Open Kitchen food market around 15 Mar – 31 Oct, and Bled's Vintgar gorge open around 20 Apr – 5 Nov.