Average temperature in December is 8.6 °C
Average daytime temperature is 12 °C
Average night temperature is 5.3 °C
Absolute maximum temperature: 18.9 °C
Absolute minimum temperature: -3 °C
Number of sunny days: 8
Number of rainy days: 22
Number of snow days: 1
Precipitation sum: 255 mm
* Weather data for Rijeka Croatia is based on climate observations for 2023 year
| December (°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 | 17 | 16.4 | 4.6 | 7.4 | 9 | 8 | 9.9 | 9.1 | 9.1 | 12.4 | 11.8 | 12.8 | 13.8 | 13.4 | 10 | 8.1 | 13.4 | 18.9 | 17.2 | 12.8 | 11.5 | 13.8 | 14.6 | 13.8 | 13.4 | 12.3 | 12.2 | 11.2 | 11.6 | 11.9 | 11.5 |
| Apparent max temperature | 15.9 | 13.6 | -1.4 | 3.9 | 7.7 | 4 | 6.8 | 6.9 | 7 | 11 | 10.5 | 12.8 | 13.3 | 10.7 | 5.5 | 2.7 | 10.6 | 19.2 | 15.5 | 12.7 | 9.7 | 12.1 | 13.2 | 12.8 | 12.6 | 11.3 | 11.3 | 9.5 | 10.4 | 11.7 | 10.1 |
| Mean temperature | 15.6 | 11.6 | 2 | 2 | 5.9 | 4.7 | 3.1 | 4.7 | 4.9 | 7.2 | 9.8 | 12.1 | 12.5 | 8.7 | 6.8 | 5.9 | 6.7 | 10.5 | 13.1 | 8.3 | 7.3 | 9.4 | 10.3 | 11 | 12 | 10.6 | 9.1 | 9.3 | 10.1 | 10.7 | 10.9 |
| Apparent mean temperature | 12.6 | -1.7 | -7 | -7.8 | -0.1 | -2.7 | -5.9 | -4.3 | -1.9 | 1.1 | 1 | 10.5 | 9.1 | 2.7 | -2.5 | -3.3 | -1.1 | 1.2 | 6.2 | 0.6 | -1.2 | 4.5 | 6.1 | 6.7 | 9.4 | 5.9 | 5.8 | 6.6 | 7.5 | 8.4 | 7.8 |
| Minimum temperature | 13.1 | 4.3 | -2.1 | -3 | 3.8 | 1 | -2.3 | -1.2 | 1.3 | 3.7 | 3.7 | 11 | 10.3 | 5.8 | 4.7 | 4.6 | 3.2 | 3.9 | 8.8 | 4.3 | 1.9 | 6.7 | 8 | 8.3 | 10.5 | 7.2 | 7.1 | 7.9 | 8.8 | 9.3 | 9.2 |
| Apparent min temperature | 14.3 | 8.5 | -3.7 | -1.7 | 3.6 | 1.2 | -0.3 | 2.3 | 2 | 5.7 | 8.2 | 11.7 | 11.8 | 6.3 | 2.1 | 0.1 | 3 | 8.8 | 11.1 | 6.5 | 5 | 7.6 | 8.8 | 10.2 | 11.6 | 9.8 | 8.1 | 8 | 9 | 10.1 | 9 |
| December | 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) | 9 | 9 | 9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.8 | 8.8 | 8.8 | 8.8 |
| Sunshine duration (h) | 0 | 1.3 | 4.8 | 6.9 | 0 | 5.5 | 6.7 | 7.6 | 5 | 5.4 | 2.4 | 0 | 0 | 7.6 | 7.6 | 1.8 | 7.6 | 7.6 | 7.6 | 3.9 | 5.8 | 7.5 | 7.5 | 4.9 | 0.2 | 3 | 7.1 | 0.2 | 3.1 | 2.9 | 0 |
| Precipitation (mm) | 25.5 | 28.3 | 6.2 | 0.3 | 25.6 | 0.2 | 0 | 0.2 | 2 | 12.9 | 13.2 | 29.2 | 70.4 | 0.2 | 0 | 0.3 | 0 | 0 | 0 | 0 | 3.3 | 0.3 | 0 | 2.5 | 3.2 | 1.1 | 0 | 1.4 | 3.9 | 4.4 | 20.8 |
| Precipitation hours | 16 | 18 | 8 | 3 | 19 | 1 | 0 | 2 | 9 | 10 | 21 | 24 | 24 | 2 | 0 | 3 | 0 | 0 | 0 | 0 | 5 | 2 | 0 | 11 | 15 | 10 | 0 | 10 | 15 | 15 | 23 |
| Wind speed (m/s) | 23.1 | 28.4 | 32.6 | 15.3 | 14.9 | 16.5 | 10.9 | 9.2 | 13.1 | 6.6 | 19.5 | 11.2 | 24.2 | 13 | 34.8 | 41.3 | 15.9 | 9.2 | 3 | 15.3 | 14.1 | 15.1 | 10.8 | 11.3 | 10 | 9.7 | 5.3 | 11.5 | 8.8 | 7.3 | 24.8 |
In December 2023, the highest daytime temperature in Rijeka was 18.9°C.
While the minimum temperature at night dropped to -3°C.
The average nighttime and daytime temperatures during December in Rijeka are 5.3°C and 12°C respectively.
The precipitation sum in December is about 255 mm.