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Has the climate in Trieste changed?

Trieste has warmed about 3.2°F between 1973 and 2020.

About 0.7°F per decade, measured from Trieste's official daily weather records, 1973–2020. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Trieste's climate has warmed more slowly than most other cities in Italy.

What has actually changed

Each card compares the 1970s (the first ten years of the record) with recent years (the last ten) — the same span the headline and the chart use.

Freezing nights
4 fewer nights
1970s
9 / yr
Recent
5 / yr
Milder winters — fewer frosts
Average temperature
+2.4°F
1970s
57.8°F
Recent
60.1°F
A steady upward drift
Hot days above 90°F
10 more days
1970s
4 / yr
Recent
14 / yr
More days of serious heat
Rainy days
19 more days
1970s
77 / yr
Recent
96 / yr
Wetter on average

Trieste's temperature, year by year

Average temperature for each year from 1973 to 2020.

55°57°59°61°63°1973: 58.4°F1974: 58.8°F1975: 58.4°F1976: 57.6°F1977: 58.2°F1978: 56.6°F1979: 58.1°F1980: 56.2°F1981: 57.3°F1982: 58.6°F1983: 58.4°F1984: 57.2°F1985: 57.4°F1986: 58.0°F1987: 57.4°F1988: 59.1°F1989: 59.5°F1990: 60.0°F1991: 58.3°F1992: 59.3°F1993: 58.6°F1994: 60.9°F1995: 58.4°F1996: 57.8°F1997: 59.4°F1998: 59.3°F1999: 59.5°F2000: 60.7°F2001: 60.1°F2002: 60.6°F2003: 60.6°F2004: 58.6°F2006: 59.9°F2007: 61.0°F2008: 60.4°F2009: 60.5°F2010: 58.5°F2011: 60.2°F2013: 59.0°F2014: 60.7°F2015: 60.2°F2016: 60.0°F2017: 59.4°F2018: 61.4°F2019: 61.5°F2020: 61.1°Flong-term trend197319801990200020102020
a warmer-than-average year a cooler-than-average year

Each bar is one year. Most recent years sit above the older ones. Some recent years still came in cool — warming is a slope, not a straight climb.

In day-to-day terms, that long-term shift shows up as about 7 more days above 90°F compared with the 1970s.

When in the year the change shows up

How much warmer each month is now than in the 1970s. Useful if you garden or care about a particular season — otherwise the headline above already has the answer.

-6.0°-5.5°-5.0°-4.5°-4.0°-3.5°-3.0°-2.5°-2.0°-1.5°-1.0°-0.5°0.0°+0.5°+1.0°+1.5°+2.0°+2.5°+3.0°+3.5°March: +1.9°F+1.9MApril: +2.1°F+2.1AMay: -5.7°F-5.7MJune: +3.2°F+3.2JSeptember: +3.5°F+3.5S

May has cooled the most — about 5.7°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Trieste, about 3 km from the city centre.

How we build these numbers →