Trieste climate by month
Averages and records for each calendar month at Trieste, Italy, from 1966 to 2025. The warmest month is July, averaging 28.9°C; the coolest is January at 8.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.0°C | 3.4°C | 18.2°C8 January 2018 | −9.0°C29 January 1985 | 23 / 55 |
| February | 9.2°C | 4.5°C | 19.6°C23 February 1990 | −7.1°C7 February 1991 | 18 / 53 |
| March | 12.7°C | 6.5°C | 23.9°C27 March 1968 | −6.1°C5 March 1971 | 37 / 55 |
| April | 17.5°C | 9.6°C | 29.0°C20 April 2000 | 0.0°C7 April 2009 | 34 / 51 |
| May | 22.2°C | 14.0°C | 32.2°C28 May 2003 | 6.0°C12 May 1978 | 36 / 52 |
| June | 26.5°C | 18.3°C | 36.8°C26 June 2019 | 8.4°C4 June 2001 | 32 / 50 |
| July | 28.9°C | 19.9°C | 36.6°C22 July 2015 | 12.0°C13 July 1989 | 43 / 52 |
| August | 28.5°C | 20.3°C | 38.0°C5 August 2017 | 12.2°C27 August 1966 | 39 / 50 |
| September | 24.4°C | 17.3°C | 34.0°C7 September 1973 | 7.0°C18 September 1977 | 33 / 52 |
| October | 18.5°C | 12.3°C | 30.8°C2 October 2011 | 1.9°C26 October 1985 | 29 / 52 |
| November | 13.7°C | 8.7°C | 24.4°C2 November 2004 | −0.7°C24 November 1988 | 26 / 51 |
| December | 9.8°C | 4.6°C | 19.0°C4 December 1974 | −5.8°C14 December 2001 | 27 / 52 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 18 to 43 years each.
See what Trieste is doing right now
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.