Average temperature in December is 10.5 °C
Average daytime temperature is 13.9 °C
Average night temperature is 7.5 °C
Absolute maximum temperature: 17.6 °C
Absolute minimum temperature: -0.1 °C
Number of sunny days: 14
Number of rainy days: 17
Number of snow days:
Precipitation sum: 170 mm
* Weather data for Porto Portugal 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 | 11.8 | 13.1 | 13.6 | 14.2 | 10.9 | 12.2 | 15.9 | 15.4 | 17.2 | 16.1 | 17.6 | 15.9 | 13.1 | 13.5 | 15.7 | 13.8 | 13.7 | 12 | 10.8 | 12.9 | 14.6 | 15 | 13.8 | 13.1 | 13.6 | 14.6 | 14.7 | 13.3 | 13 | 13 | 13.3 |
| Apparent max temperature | 10.1 | 11.7 | 12 | 11.4 | 7.9 | 10.2 | 16.6 | 14.1 | 16.1 | 14.8 | 15.6 | 14.5 | 10.5 | 11 | 12.6 | 11.1 | 12.8 | 10.4 | 8.7 | 8.9 | 12.2 | 12.7 | 11.9 | 11.9 | 11.5 | 13.2 | 11.4 | 10.4 | 11.5 | 10.9 | 11.4 |
| Mean temperature | 9.2 | 8.5 | 10.8 | 11.8 | 8 | 8.7 | 13.6 | 12.9 | 15.8 | 15.4 | 15.8 | 14.3 | 11.1 | 9.2 | 11.5 | 10 | 7.4 | 5.3 | 5.4 | 10.2 | 9.4 | 9.3 | 9 | 7.7 | 7.1 | 8.2 | 11.1 | 12.7 | 12.2 | 12.2 | 11.6 |
| Apparent mean temperature | 4.9 | 2.6 | 3.9 | 4.9 | 2.6 | 0.7 | 7 | 7.9 | 10.9 | 13.2 | 12.6 | 10.3 | 6.3 | 3.2 | 5 | 2 | -0.3 | -2.4 | -4.3 | 4.9 | 2.9 | 1.4 | 2.6 | -0.5 | 0.2 | 0.4 | 2.6 | 8 | 8.9 | 9.4 | 5.8 |
| Minimum temperature | 7.1 | 5.2 | 6.7 | 6.9 | 5.6 | 4.8 | 11.1 | 9.8 | 13.8 | 14.7 | 14.1 | 12.1 | 8.5 | 5.8 | 8.1 | 5.9 | 3.8 | 1.8 | -0.1 | 8.5 | 6.1 | 5.4 | 6.7 | 3.8 | 4 | 4.8 | 6.6 | 12 | 11.4 | 11.3 | 7.7 |
| Apparent min temperature | 7.2 | 6.7 | 6.7 | 9.4 | 4.7 | 5.4 | 10.9 | 11.3 | 14.5 | 14 | 14 | 13.1 | 8.7 | 6.9 | 8 | 6.4 | 4.3 | 1.7 | 2.4 | 6.6 | 6.7 | 6.2 | 5.5 | 4.5 | 4 | 4.9 | 7.6 | 9.3 | 10.3 | 10 | 9.4 |
| 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) | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.3 |
| Sunshine duration (h) | 8.4 | 8.4 | 3.3 | 8.3 | 0.2 | 3.8 | 0 | 5.6 | 3.3 | 1.5 | 3.8 | 0 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 7.7 | 8.1 | 8 | 5.7 | 0 | 0 | 2.8 | 7.7 |
| Precipitation (mm) | 0.6 | 0 | 27.4 | 2.4 | 0 | 0.5 | 69.6 | 3.3 | 8.4 | 3.6 | 1.2 | 24 | 1.2 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.7 | 7.9 | 2.3 | 7.7 |
| Precipitation hours | 6 | 0 | 8 | 11 | 0 | 1 | 23 | 8 | 20 | 13 | 6 | 21 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 18 | 11 | 5 |
| Wind speed (m/s) | 13.8 | 9.7 | 39.3 | 21.2 | 19.6 | 21.7 | 37.1 | 20.6 | 24.5 | 25.6 | 23.8 | 25 | 19.9 | 12.6 | 21.6 | 24.5 | 16.3 | 17.4 | 13.7 | 25.9 | 17.7 | 15.4 | 19.1 | 21.7 | 15.6 | 19.1 | 23.1 | 26.6 | 19.8 | 22.4 | 22.6 |
In December 2023, the highest daytime temperature in Porto was 17.6°C.
While the minimum temperature at night dropped to -0.1°C.
The average nighttime and daytime temperatures during December in Porto are 7.5°C and 13.9°C respectively.
The precipitation sum in December is about 170 mm.