Last updated: May 6, 2024
Under the Köppen–Geiger climate classification Trieste features a oceanic climate (Cfb).Temperatures typically range between 4 °C (39 °F) and 23 °C (74 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1534 mm (60.4 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually.Trieste enjoys an average of 3733 hours of sunshine throughout the year, and daylight varies from 8 hours 43 minutes to 15 hours 38 minutes per day.
The warmest months in Trieste are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (71 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 43 °F) throughout the day. On average each year, Trieste experiences 60 days above 25 °C (77.0 °F) and 13 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 12°C (54°F) | 19°C (66°F) | 20°C (69°F) | 24°C (75°F) | 26°C (79°F) | 33°C (91°F) | 32°C (91°F) | 34°C (93°F) | 30°C (87°F) | 22°C (72°F) | 18°C (65°F) | 14°C (58°F) |
Mean maximum | 11°C (51°F) | 14°C (57°F) | 18°C (65°F) | 21°C (70°F) | 23°C (74°F) | 28°C (83°F) | 30°C (87°F) | 32°C (89°F) | 28°C (82°F) | 22°C (71°F) | 17°C (62°F) | 13°C (55°F) |
Average high | 7°C (44°F) | 9°C (48°F) | 11°C (53°F) | 15°C (60°F) | 19°C (67°F) | 25°C (77°F) | 27°C (80°F) | 27°C (82°F) | 22°C (72°F) | 17°C (64°F) | 12°C (54°F) | 8°C (46°F) |
Daily mean | 4°C (39°F) | 6°C (43°F) | 8°C (46°F) | 12°C (54°F) | 16°C (61°F) | 21°C (71°F) | 23°C (73°F) | 23°C (74°F) | 19°C (66°F) | 14°C (58°F) | 10°C (50°F) | 6°C (42°F) |
Average low | 2°C (35°F) | 3°C (38°F) | 4°C (40°F) | 8°C (47°F) | 13°C (55°F) | 18°C (64°F) | 19°C (67°F) | 20°C (68°F) | 16°C (60°F) | 11°C (53°F) | 8°C (46°F) | 4°C (39°F) |
Mean minimum | -2°C (28°F) | -2°C (29°F) | -1°C (30°F) | 3°C (37°F) | 8°C (47°F) | 13°C (55°F) | 16°C (61°F) | 15°C (60°F) | 10°C (50°F) | 8°C (46°F) | 2°C (36°F) | -1°C (31°F) |
Minimum | -8°C (17°F) | -7°C (20°F) | -10°C (14°F) | -1°C (30°F) | 6°C (44°F) | 11°C (52°F) | 15°C (59°F) | 13°C (56°F) | 8°C (46°F) | 6°C (43°F) | 0°C (33°F) | -2°C (29°F) |
Compare temperature, precipitation, sunshine, UV index in Trieste, Italy with other places around the world.
Trieste usually has the most precipitation in May, September and November, with an average of 14 rainy days and 186 mm (7.3 inches) of precipitation per month.The driest months in Trieste are January, March and August. On average, 80 mm (3.2 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 66 (2.6) | 128 (5.0) | 87 (3.4) | 117 (4.6) | 175 (6.9) | 105 (4.1) | 93 (3.6) | 89 (3.5) | 183 (7.2) | 126 (5.0) | 199 (7.8) | 166 (6.5) |
Average precipitation days (≥ 1 mm) | 7 | 10 | 10 | 10 | 19 | 9 | 13 | 10 | 12 | 10 | 13 | 12 |
The sunniest months in Trieste are June, July and August, when the sun shines an average of 13 hours 31 minutes a day.Least sunny months in Trieste: January, February and December receive an average of 6 hours 43 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 181 | 223 | 314 | 344 | 371 | 417 | 429 | 396 | 325 | 292 | 228 | 206 |
Mean daily daylight hours | 9h 7m | 10h 22m | 11h 56m | 13h 33m | 14h 55m | 15h 38m | 15h 15m | 14h 2m | 12h 29m | 10h 53m | 9h 28m | 8h 43m |
Trieste experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure.January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Trieste UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |