ClimateAverages

Trieste Climate

Friuli Venezia Giulia, Italy · population 187,056 · 454 weather stations within 200 km · records 1750 to 2025

Average annual daytime high
15.7°C
Warmest month · July
26.0°C
Typical daytime high
Coldest month · January
-1.3°C
Typical overnight low

Trieste has an average annual daytime high of 15.7°C, based on the 1951 to 1980 baseline. Its warmest month is July, when highs typically reach 26.0°C, and its coldest is January, with overnight lows near -1.3°C.

Month by month averages

MonthAvg highAvg low
January5.4°C-1.3°CColdest
February7.3°C-0.3°C
March10.6°C2.0°C
April14.7°C5.5°C
May19.4°C9.6°C
June23.3°C13.4°C
July26.0°C15.1°CWarmest
August25.5°C15.0°C
September21.6°C12.1°C
October16.2°C7.7°C
November10.9°C3.9°C
December6.8°C0.1°C

Temperature range across the year

-3°5°12°20°28°JanFebMarAprMayJunJulAugSepOctNovDec
Daytime high Overnight low
Hottest year on record
2023
+2.5°C vs. 1951–1980
Coldest year on record
1838
-1.7°C vs. 1951–1980

These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.

Is Trieste getting hotter?

Since 1900, Trieste's average temperature has risen by +2.3°C. Compared to the earliest station records that begin in 1750, warming totals +2.6°C.

10.9°11.6°12.3°13.0°13.7°1951–1980 baseline190019251950197520002025

20-year smoothed annual temperature reconstructed from station anomalies. Dashed line: 1951–1980 baseline.

Best time to visit
May to October

Daytime highs sit within a comfortable 15°C to 26°C range.

FAQ

What is the average temperature in Trieste?

Trieste's average annual daytime high is 15.7°C, based on the 1951 to 1980 baseline period. The warmest month is July, with highs averaging 26.0°C, and the coldest is January, with lows averaging -1.3°C.

What is the warmest month in Trieste?

July is the warmest month in Trieste, with typical daytime highs of 26.0°C.

What is the hottest year on record for Trieste?

2023 is the hottest year on record for Trieste, running +2.5°C above the 1951 to 1980 baseline.

Is Trieste getting hotter?

Yes. Since 1900, Trieste has warmed by roughly +2.3°C.

When is the best time to visit Trieste?

May to October typically offers the most comfortable daytime highs, in the 15°C to 26°C range.

Nearby cities

Baseline period 1951 to 1980. Monthly averages are the mean of station observations weighted by proximity. Warming trend is the 20-year smoothed anomaly against that baseline.