Climate averages 1991–2020
Trieste weather
in January.
A cold, wet month: the coolest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Trieste: daytime highs average 7.2°C and nights cool to about 1.1°C. By daytime temperature it is the coolest month of the year.
Expect about 90 mm of rain on roughly 10 days, which makes January a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 08 min on an average January day.
The nearest other city in this atlas is Udine (63 km away). In January its highs average 6.3°C, 0.9°C cooler than Trieste, with 75 mm of rain.
Among the 79 cities listed in Italy, Trieste ranks joint 60th of 79 for the warmest January highs and 68th of 79 for the driest January (rainfall, lowest first). The mean January high of those 79 cities is 9.7°C; Trieste is 2.5°C cooler than that mean.
From January to February, average highs rise by 1.4°C to 8.6°C, and monthly rainfall rises from 90 mm to 97 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Trieste climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 7.2°C1.1°C | 1.1°C | 90 | 9.5 | 9.19 h |
| February | 8.6°C1.1°C | 1.1°C | 97 | 8.7 | 10.310 h |
| March | 12.4°C4.1°C | 4.1°C | 101 | 9.7 | 11.912 h |
| April | 16.4°C7.8°C | 7.8°C | 110 | 12.1 | 13.513 h |
| May | 20.6°C12.3°C | 12.3°C | 122 | 13.0 | 14.915 h |
| June | 24.8°C16.4°C | 16.4°C | 111 | 12.1 | 15.616 h |
| July | 27.4°C18.7°C | 18.7°C | 87 | 10.7 | 15.315 h |
| August | 27.7°C18.9°C | 18.9°C | 111 | 10.2 | 14.114 h |
| September | 22.3°C14.8°C | 14.8°C | 170 | 11.4 | 12.613 h |
| October | 17.4°C10.8°C | 10.8°C | 184 | 13.0 | 11.011 h |
| November | 12.3°C6.5°C | 6.5°C | 195 | 13.2 | 9.510 h |
| December | 8.0°C2.0°C | 2.0°C | 129 | 10.1 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Udine in JanuaryItaly · 63 kmHigh 6.3°C · Low -1.7°C · 75 mm rain
- Rijeka in JanuaryCroatia · 63 kmHigh 6.8°C · Low 0.7°C · 122 mm rain
- Ljubljana in JanuarySlovenia · 72 kmHigh 3.7°C · Low -2.7°C · 59 mm rain
- Klagenfurt am Wörthersee in JanuaryAustria · 116 kmHigh 3.1°C · Low -4.0°C · 48 mm rain
- Treviso in JanuaryItaly · 119 kmHigh 7.1°C · Low -0.4°C · 60 mm rain
- Mestre in JanuaryItaly · 120 kmHigh 7.2°C · Low 1.0°C · 60 mm rain
- Padua in JanuaryItaly · 150 kmHigh 7.4°C · Low -0.2°C · 53 mm rain
- Zagreb in JanuaryCroatia · 172 kmHigh 4.7°C · Low -2.2°C · 49 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Trieste) is explained once on the Trieste year overview and on the Sources, method and limits page.