Trieste weather in March
In March, Trieste sees average daytime highs of 11°C and overnight lows near 5°C, with 101 mm of precipitation across 9.7 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.
Highs climb over the month, from about 9°C in the first days to 12°C by the end. The sky is clear or mostly clear about 37% of the time in March, and the air most often feels dry.
Daylight stretches from about 10 h 48 min at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Trieste's 6th-clearest and 6th-windiest month. For the whole year in context, see Trieste's year-round climate.
- Daytime high
- 11°
- 9th warmest
- Overnight low
- 5°
- 4th coldest
- Precipitation
- 101 mm
- 9.7 wet days
- Daylight
- 11 h 36 min
- 6:27 AM – 6:03 PM
- Cloud cover
- 55%
- 6th clearest
- Wind
- 10 km/h
- 6th windiest
- Solar energy
- 3.49 kWh/m²
- Travel score
- 2.7
- 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 March
Highs climb over the month, from about 9°C in the first days to 12°C by the end.
A typical March day in Trieste reaches about 11°C in the afternoon and slips back to 5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 15°C. Set against its neighbours, March runs about 4°C warmer than February and about 4°C cooler than April.
| 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) | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 |
| Avg low (°C) | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 9 | 3 |
| 2 | 9 | 3 |
| 3 | 9 | 3 |
| 4 | 9 | 4 |
| 5 | 9 | 4 |
| 6 | 10 | 4 |
| 7 | 10 | 4 |
| 8 | 10 | 4 |
| 9 | 10 | 4 |
| 10 | 10 | 4 |
| 11 | 10 | 4 |
| 12 | 11 | 4 |
| 13 | 11 | 5 |
| 14 | 11 | 5 |
| 15 | 11 | 5 |
| 16 | 11 | 5 |
| 17 | 11 | 5 |
| 18 | 11 | 5 |
| 19 | 11 | 5 |
| 20 | 11 | 5 |
| 21 | 12 | 5 |
| 22 | 12 | 5 |
| 23 | 12 | 6 |
| 24 | 12 | 6 |
| 25 | 12 | 6 |
| 26 | 12 | 6 |
| 27 | 12 | 6 |
| 28 | 12 | 6 |
| 29 | 12 | 6 |
| 30 | 13 | 6 |
| 31 | 13 | 6 |
How March really feels in Trieste
Once humidity and wind are folded in, March 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.
March 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 March compares with the rest of the year at a glance. March is the 9th-warmest and 9th-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 March
The sky is clear or mostly clear about 37% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 48%.
| 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 (%) | 48 | 48 | 48 | 50 | 51 | 51 | 52 | 52 | 53 | 54 | 55 | 56 | 57 | 57 | 57 | 57 | 55 | 55 | 54 | 53 | 52 | 52 | 51 | 50 | 50 | 50 | 49 | 49 | 49 | 50 | 50 |
| Cloudier (%) | 52 | 52 | 52 | 50 | 49 | 49 | 48 | 48 | 47 | 46 | 45 | 44 | 43 | 43 | 43 | 43 | 45 | 45 | 46 | 47 | 48 | 48 | 49 | 50 | 50 | 50 | 51 | 51 | 51 | 50 | 50 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 48 | 52 |
| 2 | 48 | 52 |
| 3 | 48 | 52 |
| 4 | 50 | 50 |
| 5 | 51 | 49 |
| 6 | 51 | 49 |
| 7 | 52 | 48 |
| 8 | 52 | 48 |
| 9 | 53 | 47 |
| 10 | 54 | 46 |
| 11 | 55 | 45 |
| 12 | 56 | 44 |
| 13 | 57 | 43 |
| 14 | 57 | 43 |
| 15 | 57 | 43 |
| 16 | 57 | 43 |
| 17 | 55 | 45 |
| 18 | 55 | 45 |
| 19 | 54 | 46 |
| 20 | 53 | 47 |
| 21 | 52 | 48 |
| 22 | 52 | 48 |
| 23 | 51 | 49 |
| 24 | 50 | 50 |
| 25 | 50 | 50 |
| 26 | 50 | 50 |
| 27 | 49 | 51 |
| 28 | 49 | 51 |
| 29 | 49 | 51 |
| 30 | 50 | 50 |
| 31 | 50 | 50 |
Chance of precipitation in March
Trieste gets around 101 mm of rain and snow over 9.7 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 30% and peaks near 38% on the wettest days, and about 2 days bring snow.
| 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 | 33 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 25 | 25 | 26 | 27 | 28 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 36 | 37 | 37 | 38 |
| Snow chance (%) | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 34 | 10 |
| 2 | 34 | 9 |
| 3 | 33 | 9 |
| 4 | 33 | 8 |
| 5 | 32 | 8 |
| 6 | 31 | 7 |
| 7 | 30 | 7 |
| 8 | 29 | 6 |
| 9 | 28 | 6 |
| 10 | 27 | 6 |
| 11 | 26 | 5 |
| 12 | 25 | 5 |
| 13 | 25 | 5 |
| 14 | 24 | 4 |
| 15 | 24 | 4 |
| 16 | 25 | 4 |
| 17 | 25 | 4 |
| 18 | 26 | 4 |
| 19 | 27 | 4 |
| 20 | 28 | 4 |
| 21 | 30 | 4 |
| 22 | 31 | 4 |
| 23 | 32 | 4 |
| 24 | 33 | 4 |
| 25 | 34 | 4 |
| 26 | 35 | 4 |
| 27 | 36 | 4 |
| 28 | 36 | 4 |
| 29 | 37 | 4 |
| 30 | 37 | 3 |
| 31 | 38 | 3 |
Humidity in March
Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in March
Winds average 10 km/h in March.
Across March, daily wind ranges from about 10 km/h on the calmest days to 11 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) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| 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 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 10 | calm |
| 18 | 10 | calm |
| 19 | 10 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 10 | calm |
| 23 | 10 | calm |
| 24 | 10 | calm |
| 25 | 10 | calm |
| 26 | 10 | calm |
| 27 | 10 | calm |
| 28 | 10 | calm |
| 29 | 10 | calm |
| 30 | 10 | calm |
| 31 | 10 | calm |
Sunrise & sunset in March
Daylight runs from about 10 h 48 min at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 96 minutes over March. Sunrise moves from 6:54 AM to 5:57 AM, and sunset from 5:42 PM to 6:23 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) | 10.8 | 10.8 | 10.9 | 11.0 | 11.0 | 11.1 | 11.1 | 11.2 | 11.2 | 11.3 | 11.3 | 11.4 | 11.4 | 11.5 | 11.5 | 11.6 | 11.7 | 11.7 | 11.8 | 11.8 | 11.9 | 11.9 | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.3 | 12.3 | 12.4 | 12.4 |
| Sunrise (AM) | 6:54 | 6:53 | 6:51 | 6:49 | 6:47 | 6:45 | 6:44 | 6:42 | 6:40 | 6:38 | 6:36 | 6:34 | 6:32 | 6:30 | 6:28 | 6:27 | 6:25 | 6:23 | 6:21 | 6:19 | 6:17 | 6:15 | 6:13 | 6:11 | 6:09 | 6:07 | 6:05 | 6:03 | 6:01 | 5:59 | 5:57 |
| Sunset (PM) | 5:42 | 5:43 | 5:45 | 5:46 | 5:47 | 5:49 | 5:50 | 5:52 | 5:53 | 5:54 | 5:56 | 5:57 | 5:59 | 6:00 | 6:01 | 6:03 | 6:04 | 6:05 | 6:07 | 6:08 | 6:09 | 6:11 | 6:12 | 6:13 | 6:15 | 6:16 | 6:17 | 6:19 | 6:20 | 6:21 | 6:23 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.8 | 6:54 | 5:42 |
| 2 | 10.8 | 6:53 | 5:43 |
| 3 | 10.9 | 6:51 | 5:45 |
| 4 | 11.0 | 6:49 | 5:46 |
| 5 | 11.0 | 6:47 | 5:47 |
| 6 | 11.1 | 6:45 | 5:49 |
| 7 | 11.1 | 6:44 | 5:50 |
| 8 | 11.2 | 6:42 | 5:52 |
| 9 | 11.2 | 6:40 | 5:53 |
| 10 | 11.3 | 6:38 | 5:54 |
| 11 | 11.3 | 6:36 | 5:56 |
| 12 | 11.4 | 6:34 | 5:57 |
| 13 | 11.4 | 6:32 | 5:59 |
| 14 | 11.5 | 6:30 | 6:00 |
| 15 | 11.5 | 6:28 | 6:01 |
| 16 | 11.6 | 6:27 | 6:03 |
| 17 | 11.7 | 6:25 | 6:04 |
| 18 | 11.7 | 6:23 | 6:05 |
| 19 | 11.8 | 6:21 | 6:07 |
| 20 | 11.8 | 6:19 | 6:08 |
| 21 | 11.9 | 6:17 | 6:09 |
| 22 | 11.9 | 6:15 | 6:11 |
| 23 | 12.0 | 6:13 | 6:12 |
| 24 | 12.0 | 6:11 | 6:13 |
| 25 | 12.1 | 6:09 | 6:15 |
| 26 | 12.2 | 6:07 | 6:16 |
| 27 | 12.2 | 6:05 | 6:17 |
| 28 | 12.3 | 6:03 | 6:19 |
| 29 | 12.3 | 6:01 | 6:20 |
| 30 | 12.4 | 5:59 | 6:21 |
| 31 | 12.4 | 5:57 | 6:23 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 3.49 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 — March's 3.49 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) | 2.8 | 2.9 | 2.9 | 3.0 | 3.0 | 3.1 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | 3.4 | 3.4 | 3.5 | 3.5 | 3.5 | 3.6 | 3.6 | 3.6 | 3.7 | 3.7 | 3.8 | 3.8 | 3.8 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.1 | 4.2 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 2.8 | Moderate |
| 2 | 2.9 | Moderate |
| 3 | 2.9 | Moderate |
| 4 | 3.0 | Moderate |
| 5 | 3.0 | Moderate |
| 6 | 3.1 | Moderate |
| 7 | 3.1 | Moderate |
| 8 | 3.2 | Moderate |
| 9 | 3.2 | Moderate |
| 10 | 3.3 | Moderate |
| 11 | 3.3 | Moderate |
| 12 | 3.4 | Moderate |
| 13 | 3.4 | Moderate |
| 14 | 3.5 | Moderate |
| 15 | 3.5 | Moderate |
| 16 | 3.5 | Moderate |
| 17 | 3.6 | Moderate |
| 18 | 3.6 | Moderate |
| 19 | 3.6 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.7 | Moderate |
| 22 | 3.8 | Moderate |
| 23 | 3.8 | Moderate |
| 24 | 3.8 | Moderate |
| 25 | 3.9 | Moderate |
| 26 | 3.9 | Moderate |
| 27 | 4.0 | Moderate |
| 28 | 4.0 | Bright |
| 29 | 4.0 | Bright |
| 30 | 4.1 | Bright |
| 31 | 4.2 | Bright |
Is March a good time to visit Trieste?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a weaker month for outdoor sightseeing in Trieste.
What to pack for Trieste in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Trieste sees daytime highs around 11°C and nights near 5°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.
Sea temperature near Trieste in March
The nearest coast averages about 10°C in March — 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 March
Clear-sky midday UV in March peaks around 4 — 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 March
Average fine-particle pollution (PM2.5) through the year — so you can see where March 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).