Trieste weather by month & the best time to visit
Italy · beach resort · humid subtropical climate
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The best time to visit Trieste is July — its sunniest month (Sunshine Score 77/100), with June and May close behind. Trieste averages about 2,292 hours of sunshine a year. Daytime highs around 30°C / 86°F and roughly 81 mm of rain in July.
When is the best time to visit Trieste?
For sunshine, the best time to visit Trieste is July, then June and May. The dullest month is January (0/100, 65 mm of rain). The full month-by-month picture is in the table below.
How sunny is Trieste?
Trieste gets a moderate 2,292 hours of sunshine a year. 77 Sunshine Score points separate July (77) from January (0), so the month you pick matters. It ranks #29 of 38 destinations in Italy for annual sunshine, below the national median of 2,538 hours. The year's 1,094 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | 0° / 32°F | 65 mm | 1 | 9° / 48°F |
| February | 0 | 8° / 46°F | 1° / 34°F | 76 mm | 1 | 9° / 48°F |
| March | 33 | 13° / 55°F | 4° / 39°F | 77 mm | 3 | 13° / 55°F |
| April | 65 | 18° / 64°F | 8° / 46°F | 75 mm | 4 | 16° / 61°F |
| May | 75 | 22° / 72°F | 13° / 55°F | 95 mm | 5 | 19° / 66°F |
| June | 76 | 27° / 81°F | 17° / 63°F | 86 mm | 6 | 24° / 75°F |
| July | 77 | 30° / 86°F | 19° / 66°F | 81 mm | 7 | 28° / 82°F |
| August | 75 | 30° / 86°F | 19° / 66°F | 95 mm | 6 | 28° / 82°F |
| September | 71 | 24° / 75°F | 14° / 57°F | 116 mm | 4 | 24° / 75°F |
| October | 60 | 18° / 64°F | 10° / 50°F | 111 mm | 2 | 19° / 66°F |
| November | 29 | 13° / 55°F | 6° / 43°F | 121 mm | 1 | 15° / 59°F |
| December | 0 | 8° / 46°F | 2° / 36°F | 96 mm | 1 | 10° / 50°F |
Sea temperature in Trieste by month
The sea off Trieste is warmest in July at around 28°C / 82°F, and coolest in January at 9°C / 48°F. The water sits at a comfortable 21°C or warmer roughly 4 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Trieste compares month by month: Trieste vs Ljubljana · Trieste vs Venice · Trieste vs Rijeka(Omišalj) · Trieste vs Pula · all comparisons
Trieste: questions and answers
What kind of destination is Trieste?
Trieste is a beach resort in Italy with a humid subtropical climate — the sea reaches 28°C at its warmest and is swimmable (21°C+) about 4 months a year.
How many hours of sunshine does Trieste get a year?
Trieste gets about 2,292 hours of sunshine a year, at its best around July.
When is the best time to visit Trieste?
The sunniest time to visit Trieste is July, when the Sunshine Score peaks at 77/100 (with June and May close behind). Expect daytime highs around 30°C / 86°F.
What is the least sunny month in Trieste?
January is the least sunny month in Trieste, scoring 0/100 with about 65 mm of rain.
What is the sea temperature in Trieste?
The sea in Trieste ranges from about 9°C (January) to 28°C (July). Month-by-month sea temperatures are on this page.
How strong is the sun in Trieste?
The typical midday UV index in Trieste peaks around 7 (high) in July, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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