Trieste weather in August
In August, Trieste sees average daytime highs of 26°C and overnight lows near 19°C, with 111 mm of rain across 10.3 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.
Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 54% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Trieste's 1st-clearest and 10th-windiest month. For the whole year in context, see Trieste's year-round climate.
- Daytime high
- 26°
- 1st warmest
- Overnight low
- 19°
- 11th coldest
- Rainfall
- 111 mm
- 10.3 wet days
- Daylight
- 13 h 54 min
- 5:11 AM – 7:07 PM
- Cloud cover
- 41%
- 1st clearest
- Wind
- 9 km/h
- 10th windiest
- Solar energy
- 5.45 kWh/m²
- Travel score
- 7.0
- out of 10
- Air quality
- Moderate
- PM2.5 12 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 27°C in the first days to 24°C by the end.
A typical August day in Trieste reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, August runs on par with July and about 5°C warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 20 |
| 2 | 27 | 20 |
| 3 | 27 | 20 |
| 4 | 27 | 20 |
| 5 | 27 | 20 |
| 6 | 27 | 20 |
| 7 | 27 | 19 |
| 8 | 27 | 19 |
| 9 | 26 | 19 |
| 10 | 26 | 19 |
| 11 | 26 | 19 |
| 12 | 26 | 19 |
| 13 | 26 | 19 |
| 14 | 26 | 19 |
| 15 | 26 | 19 |
| 16 | 26 | 19 |
| 17 | 26 | 19 |
| 18 | 26 | 19 |
| 19 | 26 | 19 |
| 20 | 26 | 19 |
| 21 | 25 | 19 |
| 22 | 25 | 18 |
| 23 | 25 | 18 |
| 24 | 25 | 18 |
| 25 | 25 | 18 |
| 26 | 25 | 18 |
| 27 | 25 | 18 |
| 28 | 24 | 18 |
| 29 | 24 | 18 |
| 30 | 24 | 17 |
| 31 | 24 | 17 |
How August really feels in Trieste
Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Trieste weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 6° / 2° | 90 | 9.5 | 2.7 | 8.9 | 0.5 |
| Feb | 7° / 2° | 97 | 8.6 | 2.9 | 10.1 | 1.1 |
| Mar | 11° / 5° | 101 | 9.7 | 1.6 | 11.6 | 2.7 |
| Apr | 15° / 8° | 110 | 12.1 | 0.5 | 13.3 | 4.2 |
| May | 19° / 13° | 122 | 13 | 0 | 14.7 | 5.8 |
| Jun | 23° / 17° | 111 | 12.2 | 0 | 15.4 | 6.7 |
| Jul | 26° / 19° | 87 | 10.7 | 0 | 15.1 | 7.0 |
| Aug | 26° / 19° | 111 | 10.3 | 0 | 13.9 | 7.0 |
| Sep | 21° / 15° | 170 | 11.4 | 0 | 12.3 | 6.4 |
| Oct | 16° / 11° | 184 | 13 | 0.1 | 10.7 | 4.8 |
| Nov | 11° / 7° | 195 | 13.2 | 1.1 | 9.3 | 2.5 |
| Dec | 7° / 3° | 129 | 10.1 | 2.1 | 8.6 | 0.9 |
Cloud cover in August
The sky is clear or mostly clear about 54% of the time in August, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 73 | 73 | 74 | 75 | 75 | 75 | 75 | 76 | 76 | 75 | 75 | 75 | 75 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 73 | 72 | 72 | 71 | 70 | 70 | 69 | 68 | 68 | 67 | 67 |
| Cloudier (%) | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 30 | 30 | 31 | 32 | 32 | 33 | 33 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 73 | 27 |
| 2 | 73 | 27 |
| 3 | 74 | 26 |
| 4 | 75 | 25 |
| 5 | 75 | 25 |
| 6 | 75 | 25 |
| 7 | 75 | 25 |
| 8 | 76 | 24 |
| 9 | 76 | 24 |
| 10 | 75 | 25 |
| 11 | 75 | 25 |
| 12 | 75 | 25 |
| 13 | 75 | 25 |
| 14 | 76 | 24 |
| 15 | 76 | 24 |
| 16 | 75 | 25 |
| 17 | 75 | 25 |
| 18 | 75 | 25 |
| 19 | 74 | 26 |
| 20 | 74 | 26 |
| 21 | 73 | 27 |
| 22 | 72 | 28 |
| 23 | 72 | 28 |
| 24 | 71 | 29 |
| 25 | 70 | 30 |
| 26 | 70 | 30 |
| 27 | 69 | 31 |
| 28 | 68 | 32 |
| 29 | 68 | 32 |
| 30 | 67 | 33 |
| 31 | 67 | 33 |
Chance of precipitation in August
Trieste gets around 111 mm of rain over 10.3 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 34% and peaks near 36% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 36 |
| Rain chance (%) | |
|---|---|
| 1 | 34 |
| 2 | 34 |
| 3 | 34 |
| 4 | 34 |
| 5 | 34 |
| 6 | 34 |
| 7 | 33 |
| 8 | 33 |
| 9 | 33 |
| 10 | 33 |
| 11 | 33 |
| 12 | 33 |
| 13 | 33 |
| 14 | 32 |
| 15 | 32 |
| 16 | 32 |
| 17 | 32 |
| 18 | 32 |
| 19 | 32 |
| 20 | 32 |
| 21 | 33 |
| 22 | 33 |
| 23 | 33 |
| 24 | 34 |
| 25 | 34 |
| 26 | 35 |
| 27 | 35 |
| 28 | 35 |
| 29 | 36 |
| 30 | 36 |
| 31 | 36 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 12 | 13 | 15 | 16 | 18 | 20 | 21 | 23 | 25 |
| Comfortable (%) | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 23 | 23 | 24 | 25 | 26 | 27 |
| Humid (%) | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 36 | 36 | 37 | 38 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 44 | 45 | 45 | 45 | 44 | 44 | 43 | 42 | 41 | 40 | 39 | 37 | 36 |
| Muggy (%) | 40 | 41 | 41 | 40 | 40 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 18 | 17 | 16 | 15 | 14 | 12 |
| Oppressive (%) | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 5 | 17 | 35 | 40 | 2 |
| 2 | 5 | 17 | 35 | 41 | 2 |
| 3 | 5 | 18 | 35 | 41 | 1 |
| 4 | 5 | 18 | 35 | 40 | 1 |
| 5 | 5 | 18 | 35 | 40 | 1 |
| 6 | 6 | 19 | 35 | 40 | 1 |
| 7 | 6 | 19 | 35 | 39 | 1 |
| 8 | 6 | 20 | 36 | 38 | 1 |
| 9 | 6 | 20 | 36 | 37 | 1 |
| 10 | 6 | 20 | 37 | 36 | 0 |
| 11 | 6 | 21 | 38 | 35 | 0 |
| 12 | 7 | 21 | 38 | 34 | 0 |
| 13 | 7 | 21 | 39 | 33 | 0 |
| 14 | 7 | 21 | 40 | 32 | 0 |
| 15 | 7 | 21 | 41 | 31 | 0 |
| 16 | 7 | 21 | 42 | 29 | 0 |
| 17 | 7 | 21 | 43 | 28 | 1 |
| 18 | 8 | 21 | 44 | 27 | 1 |
| 19 | 8 | 21 | 44 | 26 | 1 |
| 20 | 9 | 21 | 45 | 25 | 1 |
| 21 | 9 | 21 | 45 | 24 | 1 |
| 22 | 10 | 21 | 45 | 23 | 1 |
| 23 | 12 | 21 | 44 | 22 | 1 |
| 24 | 13 | 22 | 44 | 21 | 1 |
| 25 | 15 | 22 | 43 | 20 | 1 |
| 26 | 16 | 23 | 42 | 18 | 1 |
| 27 | 18 | 23 | 41 | 17 | 1 |
| 28 | 20 | 24 | 40 | 16 | 0 |
| 29 | 21 | 25 | 39 | 15 | 0 |
| 30 | 23 | 26 | 37 | 14 | 0 |
| 31 | 25 | 27 | 36 | 12 | 0 |
Wind in August
Winds average 9 km/h in August.
Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 36 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 84 minutes over August. Sunrise moves from 4:52 AM to 5:29 AM, and sunset from 7:30 PM to 6:40 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.6 | 14.6 | 14.5 | 14.5 | 14.5 | 14.4 | 14.4 | 14.3 | 14.3 | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 |
| Sunrise (AM) | 4:52 | 4:53 | 4:55 | 4:56 | 4:57 | 4:58 | 4:59 | 5:01 | 5:02 | 5:03 | 5:04 | 5:06 | 5:07 | 5:08 | 5:09 | 5:11 | 5:12 | 5:13 | 5:14 | 5:16 | 5:17 | 5:18 | 5:19 | 5:21 | 5:22 | 5:23 | 5:24 | 5:26 | 5:27 | 5:28 | 5:29 |
| Sunset (PM) | 7:30 | 7:28 | 7:27 | 7:26 | 7:24 | 7:23 | 7:22 | 7:20 | 7:19 | 7:17 | 7:16 | 7:14 | 7:12 | 7:11 | 7:09 | 7:07 | 7:06 | 7:04 | 7:02 | 7:01 | 6:59 | 6:57 | 6:55 | 6:53 | 6:52 | 6:50 | 6:48 | 6:46 | 6:44 | 6:42 | 6:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.6 | 4:52 | 7:30 |
| 2 | 14.6 | 4:53 | 7:28 |
| 3 | 14.5 | 4:55 | 7:27 |
| 4 | 14.5 | 4:56 | 7:26 |
| 5 | 14.5 | 4:57 | 7:24 |
| 6 | 14.4 | 4:58 | 7:23 |
| 7 | 14.4 | 4:59 | 7:22 |
| 8 | 14.3 | 5:01 | 7:20 |
| 9 | 14.3 | 5:02 | 7:19 |
| 10 | 14.2 | 5:03 | 7:17 |
| 11 | 14.2 | 5:04 | 7:16 |
| 12 | 14.1 | 5:06 | 7:14 |
| 13 | 14.1 | 5:07 | 7:12 |
| 14 | 14.0 | 5:08 | 7:11 |
| 15 | 14.0 | 5:09 | 7:09 |
| 16 | 13.9 | 5:11 | 7:07 |
| 17 | 13.9 | 5:12 | 7:06 |
| 18 | 13.9 | 5:13 | 7:04 |
| 19 | 13.8 | 5:14 | 7:02 |
| 20 | 13.8 | 5:16 | 7:01 |
| 21 | 13.7 | 5:17 | 6:59 |
| 22 | 13.7 | 5:18 | 6:57 |
| 23 | 13.6 | 5:19 | 6:55 |
| 24 | 13.5 | 5:21 | 6:53 |
| 25 | 13.5 | 5:22 | 6:52 |
| 26 | 13.4 | 5:23 | 6:50 |
| 27 | 13.4 | 5:24 | 6:48 |
| 28 | 13.3 | 5:26 | 6:46 |
| 29 | 13.3 | 5:27 | 6:44 |
| 30 | 13.2 | 5:28 | 6:42 |
| 31 | 13.2 | 5:29 | 6:40 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.45 kWh/m².
For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 6.28 kWh/m² in July across the year — August's 5.45 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.7 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.0 | Bright |
| 2 | 6.0 | Bright |
| 3 | 5.9 | Bright |
| 4 | 5.9 | Bright |
| 5 | 5.9 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.7 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.6 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.6 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.5 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.1 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.7 | Bright |
Is August a good time to visit Trieste?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit Trieste for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Trieste in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Trieste sees daytime highs around 26°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.
Sea temperature near Trieste in August
The nearest coast averages about 25°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 25°C and coldest in February near 10°C.
It's comfortable for a long swim from May 31 to Oct 9 — about 4.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 11 | 10 | 10 | 13 | 18 | 23 | 25 | 25 | 23 | 19 | 16 | 13 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 11 | Bracing |
| Feb | 10 | Bracing |
| Mar | 10 | Bracing |
| Apr | 13 | Bracing |
| May | 18 | Cool |
| Jun | 23 | Refreshing |
| Jul | 25 | Warm |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 16 | Cool |
| Dec | 13 | Bracing |
UV index in Trieste in August
Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Trieste peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 7 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Trieste in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Trieste is worst in January — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (September, 9 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Trieste's WHO annual average of 12 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 14 | 14 | 13 | 11 | 12 | 12 | 10 | 9 | 10 | 10 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 14 | Moderate |
| Mar | 14 | Moderate |
| Apr | 13 | Moderate |
| May | 11 | Good |
| Jun | 12 | Good |
| Jul | 12 | Good |
| Aug | 10 | Good |
| Sep | 9 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 13 | Moderate |
Where is Trieste?
Trieste sits at 45.6°N, 13.8°E, 2 m above sea level, in Italy. The nearest listed city is Koper, 12 km away.
Topography around Trieste
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Trieste.
Within 3 km, the terrain around Trieste has significant variations in elevation — a maximum elevation change of 451 m around an average of 72 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 779 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,524 m.
The land around Trieste is covered by artificial surfaces (41%), trees (31%) and water (27%) within 3 km, trees (50%) and water (32%) within 16 km, and trees (52%) and water (23%) within 80 km.
Italy travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 230 V · 50 Hz
- Prices
- ≈ 69% of US
- price level, 2025
- GDP per capita
- $43,309
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 513
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Trieste (45.6495°, 13.7768°, elevation 2 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).