Trieste weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: May – September
What is the weather like in Trieste in October?
In October, Trieste is mild: daytime highs average 18 °C, and nights cool down to about 12 °C. The sea averages 19.4 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 145 mm in total. All in all, October is a good month for a holiday in Trieste.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 81 | 69 | 39 |
| Day | 22° | 18° | 13° |
| Night | 16° | 12° | 8° |
| Sea | 23° | 19° | 16° |
| Sun | 7 h | 6 h | 4 h |
| Rain days | 10 | 12 | 13 |
More details for October
- Daylight
- 11 h 2 min07:20 – 18:21
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 55 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Rome
How the score comes together
- Temperatureweight 50 %96 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 30 %44 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Trieste in October: quick answers
Is Trieste hot in October?
No. In October, Trieste is mild: daytime highs average 18 °C and nights drop to about 12 °C.
Can you swim in Trieste in October?
Only if you don't mind cold water: in October the sea averages just 19.4 °C. Comfortable swimming is possible from June to September.
Does it rain much in Trieste in October?
Rain is frequent, with about 12 rainy days and 145 mm in total.
Trieste month by month
The whole year in TriesteAll destinations: ItalyWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences