Average temperature in December is 11.6 °C
Average daytime temperature is 15.8 °C
Average night temperature is 8.1 °C
Absolute maximum temperature: 19.8 °C
Absolute minimum temperature: 2.3 °C
Number of sunny days: 18
Number of rainy days: 13
Number of snow days:
Precipitation sum: 35 mm
* Weather data for Barreiro 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 | 14.8 | 15.3 | 16.5 | 17.3 | 11.3 | 13.7 | 19.3 | 17.8 | 19.8 | 19.2 | 18.8 | 19.7 | 16 | 15.1 | 16.1 | 16.2 | 14.3 | 13 | 13.5 | 16.3 | 15.7 | 15.6 | 14.6 | 14.7 | 14 | 15.2 | 13.8 | 15.5 | 14.4 | 16.5 | 15.2 |
| Apparent max temperature | 11.6 | 13.3 | 13.5 | 16 | 9.3 | 12.8 | 17.7 | 17.4 | 19.7 | 19.3 | 19.2 | 18.7 | 14.5 | 11.9 | 13.4 | 14.1 | 12.9 | 11.6 | 11.1 | 12.6 | 12.9 | 13.8 | 13.6 | 14.2 | 13.9 | 14.6 | 13.3 | 15.1 | 13.9 | 16.7 | 14.7 |
| Mean temperature | 11.4 | 10.9 | 11.8 | 13.7 | 10.5 | 10.4 | 15.8 | 14.6 | 16.4 | 16.4 | 15.4 | 17.3 | 13.7 | 11.7 | 10.6 | 10.6 | 8.5 | 7.7 | 7.7 | 13 | 11.2 | 10.5 | 8.9 | 7.6 | 8.8 | 9.1 | 9.6 | 11.2 | 10.5 | 11.4 | 11.6 |
| Apparent mean temperature | 6 | 5.3 | 4.7 | 9.2 | 7.7 | 5.6 | 9.6 | 11 | 13.6 | 14 | 11.2 | 15.1 | 8.7 | 6.7 | 3.8 | 4.9 | 2.3 | 1.5 | -1 | 7 | 5.4 | 5 | 2.6 | 1.4 | 3.3 | 3.5 | 2.7 | 6.9 | 5.8 | 4.4 | 7.8 |
| Minimum temperature | 8.3 | 7.7 | 6.4 | 10.3 | 9.5 | 7.8 | 10.9 | 11.9 | 13.3 | 13.5 | 11.7 | 14.8 | 10.1 | 8.6 | 6.5 | 7.1 | 4.9 | 4.3 | 2.3 | 10.1 | 7.6 | 7.1 | 5.3 | 3.8 | 5.1 | 5.7 | 4.9 | 8.4 | 7.5 | 6 | 9.2 |
| Apparent min temperature | 9.2 | 9.1 | 9.8 | 12.6 | 8.3 | 8.7 | 15 | 14.4 | 16.5 | 17.2 | 15.5 | 17.4 | 11.5 | 9.4 | 8 | 8.5 | 6.5 | 5.6 | 5.1 | 10.5 | 8.6 | 8.5 | 6.9 | 5.9 | 7.6 | 7.6 | 8 | 10.1 | 9.4 | 10.7 | 10.9 |
| 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) | 9.7 | 9.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 |
| Sunshine duration (h) | 8.7 | 8.7 | 5.8 | 7.1 | 0 | 8.4 | 1 | 4.1 | 4.5 | 6.3 | 6.7 | 7.2 | 8 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 7.8 | 8.5 | 8.5 | 8.5 | 8.1 | 2.2 | 8.2 | 4.2 | 5.5 | 5.3 | 7.5 | 3.6 |
| Precipitation (mm) | 0.3 | 0.3 | 3.3 | 12 | 6.5 | 0 | 6.6 | 0 | 1.1 | 0.6 | 0 | 1.8 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 1.4 | 0.6 |
| Precipitation hours | 3 | 2 | 4 | 3 | 11 | 0 | 10 | 0 | 6 | 2 | 0 | 9 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 4 |
| Wind speed (m/s) | 20 | 10.5 | 23.4 | 22.7 | 20.2 | 15.1 | 28.8 | 12.8 | 18.8 | 12.6 | 14 | 23.8 | 21.6 | 17 | 16.1 | 14.2 | 11.8 | 11.3 | 14.4 | 25.6 | 19 | 12 | 11.2 | 9.4 | 6.6 | 9 | 13 | 12.9 | 8.3 | 10.7 | 10.5 |
In December 2023, the highest daytime temperature in Barreiro was 19.8°C.
While the minimum temperature at night dropped to 2.3°C.
The average nighttime and daytime temperatures during December in Barreiro are 8.1°C and 15.8°C respectively.
The precipitation sum in December is about 35 mm.