Monthly climate guide
Trieste weather in December
December in Trieste is typically cool, with average daytime highs around 9°C (47°F) and night-time lows near 4°C (38°F). The month usually brings about 91 mm of rain (wet) and is often cloudy. Daytime highs are 4°C cooler than November and 2°C warmer than January.
What stands out in December
- Seasonally, December counts as early winter in Trieste.
- December is among Trieste's three coolest months.
- Days and nights are close, only about 5°C apart.
- Trieste is usually about 2°C warmer than Udine, 60 km away, in December.
Avg high
9°C
47°F
Avg low
4°C
38°F
Rainfall
91 mm
wet
Humidity
83%
relative
Sky
73%
cloud · often cloudy
Trieste weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 7°C / 44°F | 2°C / 35°F | 66 mm | 83% | 74% |
| February | 8°C / 46°F | 2°C / 35°F | 99 mm | 82% | 70% |
| March | 12°C / 53°F | 5°C / 40°F | 75 mm | 78% | 58% |
| April | 16°C / 61°F | 9°C / 47°F | 63 mm | 74% | 58% |
| May | 20°C / 67°F | 13°C / 55°F | 105 mm | 73% | 60% |
| June | 24°C / 76°F | 17°C / 63°F | 78 mm | 71% | 51% |
| July | 27°C / 81°F | 20°C / 67°F | 65 mm | 66% | 45% |
| August | 28°C / 82°F | 19°C / 67°F | 73 mm | 65% | 40% |
| September | 23°C / 73°F | 16°C / 60°F | 114 mm | 71% | 53% |
| October | 18°C / 64°F | 11°C / 52°F | 118 mm | 78% | 63% |
| November | 13°C / 55°F | 7°C / 45°F | 138 mm | 83% | 71% |
| December | 9°C / 47°F | 4°C / 38°F | 91 mm | 83% | 73% |
What to pack for December
- A proper insulated winter coat
- A hat, scarf and gloves
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is December a good time to visit Trieste?
Compare the months in the chart above to find your ideal window.
Best time to visit Trieste →Other Italy cities in December
Cite or embed this data
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Trieste weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/italy/trieste/december
<a href="https://weathercompare.eu/weather/italy/trieste/december">Trieste weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/italy/trieste" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Trieste weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/italy/trieste/december">Trieste weather in December</a> – WeatherCompare</p>
Trieste in December: quick answers
Is December a good time to visit Trieste?
December is cool in Trieste, with highs around 9°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Trieste in December?
Average highs are about 9°C (47°F) and average lows about 4°C (38°F), based on 10 years of daily data.
Does it rain a lot in Trieste in December?
Trieste typically gets around 91 mm of rain in December — wet.
Figures are long-term averages for the area around Trieste (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.