Average temperature in January is 7 °C
Average daytime temperature is 9.6 °C
Average night temperature is 4.9 °C
Absolute maximum temperature: 14.1 °C
Absolute minimum temperature: -1.4 °C
Number of sunny days: 9
Number of rainy days: 18
Number of snow days: 4
Precipitation sum: 147 mm
* Weather data for Trieste Italy is based on climate observations for 2023 year
| Gennaio (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 12.8 | 11.4 | 12.4 | 14.1 | 10.3 | 12.8 | 10.7 | 11.9 | 14 | 12.5 | 11.7 | 13.8 | 11.8 | 12.8 | 11.2 | 10.8 | 8.9 | 7.7 | 7.4 | 5.3 | 5.4 | 5.6 | 6.5 | 8.6 | 7.1 | 4.8 | 4.4 | 6 | 6.6 | 7.5 | 10.1 |
| Apparent max temperature | 12 | 10.8 | 12.7 | 13.4 | 9.2 | 11.4 | 9.8 | 9.8 | 12.8 | 10.4 | 8.8 | 11.9 | 9.6 | 10.9 | 9 | 9.1 | 6.7 | 5.8 | 3.1 | -1.2 | -0.8 | -1 | 0.2 | 3.6 | 1 | -2.4 | -2.4 | 0.2 | 2 | 4.6 | 7.2 |
| Mean temperature | 11.4 | 10.8 | 11.5 | 10.8 | 9.5 | 9.4 | 9.5 | 10.3 | 10.7 | 8.3 | 6.5 | 8.6 | 8.5 | 8.1 | 9.6 | 7.6 | 6.4 | 6.5 | 5 | 3.1 | 3.1 | 3.8 | 5.4 | 6.4 | 5.6 | 3.2 | 2.7 | 3.2 | 3.2 | 3.1 | 4.8 |
| Apparent mean temperature | 10 | 9.6 | 9.8 | 7 | 6.8 | 3.4 | 6.6 | 7.2 | 3.5 | 1.1 | -2.3 | 2.4 | 3.7 | 1.5 | 4.6 | -0.5 | 0.6 | 1.1 | -2.5 | -4.8 | -6 | -5.4 | -4.6 | -0.3 | -3.1 | -5.5 | -5.4 | -5.4 | -3.8 | -4.7 | -4.2 |
| Minimum temperature | 10.7 | 10.4 | 10.7 | 9.2 | 8.2 | 6.2 | 8.4 | 8.9 | 7.3 | 5.4 | 2.1 | 5.6 | 6.1 | 4.3 | 7.5 | 5.3 | 5.1 | 4.8 | 3.4 | 1.9 | 1.8 | 2.7 | 3.8 | 5.1 | 3.8 | 1.8 | 1.3 | 1.3 | 1 | -1.4 | -1 |
| Apparent min temperature | 10.7 | 9.9 | 11.3 | 9.6 | 8 | 7.9 | 7.7 | 8.6 | 8.3 | 6 | 2.9 | 5.8 | 6.5 | 5.5 | 7.2 | 4.2 | 3.3 | 3.9 | -0.3 | -3.3 | -4.1 | -3.8 | -1.8 | 1.1 | -1.1 | -4 | -3.8 | -2.8 | -1.7 | -0.2 | 1.5 |
| Gennaio | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.9 | 8.9 | 8.9 | 8.9 | 9 | 9 | 9 | 9.1 | 9.1 | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.7 |
| Sunshine duration (h) | 1.2 | 0 | 0 | 7.1 | 0 | 6.7 | 1.3 | 0 | 1.5 | 6.9 | 5.5 | 7.3 | 1.9 | 7.8 | 1.7 | 3.7 | 0.6 | 0.2 | 4.8 | 7.8 | 4.9 | 7.2 | 0 | 0.2 | 5.2 | 8.3 | 7.9 | 7.9 | 8.4 | 8 | 8.6 |
| Precipitation (mm) | 0.1 | 2.2 | 3.8 | 0 | 4.1 | 0 | 1.1 | 7.2 | 31.1 | 1.4 | 0 | 0.7 | 0.2 | 0.4 | 12.2 | 44.5 | 14.8 | 4 | 3.1 | 0.3 | 0.4 | 0.1 | 14.1 | 1.1 | 0 | 0 | 0.3 | 0 | 0 | 0 | 0 |
| Precipitation hours | 1 | 14 | 12 | 0 | 16 | 0 | 9 | 19 | 24 | 5 | 0 | 2 | 1 | 2 | 16 | 19 | 13 | 11 | 11 | 1 | 4 | 1 | 15 | 4 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 9.7 | 10.4 | 7.9 | 15.8 | 14.3 | 12.1 | 12.6 | 20 | 30.3 | 16.2 | 18.1 | 19.2 | 11.1 | 18.1 | 18.4 | 29.8 | 23.7 | 17.9 | 28.7 | 29.8 | 42.1 | 39.2 | 48.7 | 27.2 | 38.5 | 37.5 | 31.7 | 28 | 20 | 13.9 | 13.2 |
In January 2023, the highest daytime temperature in Trieste was 14.1°C.
While the minimum temperature at night dropped to -1.4°C.
The average nighttime and daytime temperatures during January in Trieste are 4.9°C and 9.6°C respectively.
The precipitation sum in January is about 147 mm.