Average temperature in December is 20.8 °C
Average daytime temperature is 27.8 °C
Average night temperature is 15 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: 9.9 °C
Number of sunny days: 9
Number of rainy days: 22
Number of snow days:
Precipitation sum: 185 mm
* Weather data for Newcastle South Africa 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 | 30.8 | 33.7 | 34.7 | 34.3 | 27.9 | 21.1 | 25.6 | 30 | 32.1 | 21.6 | 20.6 | 28.4 | 23.8 | 31 | 29.9 | 24.8 | 30 | 31.6 | 27.3 | 32.1 | 30.3 | 31.7 | 31.9 | 30.7 | 26.4 | 18.4 | 19 | 23.7 | 23.8 | 26.1 | 28.8 |
| Apparent max temperature | 32.6 | 35.9 | 34.6 | 34.8 | 30.3 | 21.7 | 25.9 | 29.3 | 31.6 | 23.9 | 22.7 | 30.4 | 26.6 | 32 | 32.9 | 28.9 | 32.6 | 35.7 | 31.6 | 34.2 | 35.4 | 35.4 | 34.3 | 34.5 | 30.6 | 18.7 | 18 | 25.3 | 25.4 | 27.9 | 30.3 |
| Mean temperature | 21.4 | 25 | 25.4 | 24.6 | 21.2 | 17.2 | 19.6 | 22.8 | 23.7 | 17.9 | 16.5 | 20.9 | 17.9 | 22.4 | 21.1 | 19.1 | 22.5 | 24.4 | 21.5 | 23.4 | 22.1 | 22.9 | 23.1 | 22.4 | 20 | 15.7 | 14.5 | 16.7 | 18.1 | 19.5 | 21.8 |
| Apparent mean temperature | 9.6 | 14.5 | 17.2 | 18.3 | 15.4 | 14.3 | 15.7 | 15.7 | 19.4 | 14.9 | 14.7 | 13.2 | 14.3 | 15.4 | 16.7 | 16.8 | 17.6 | 17.1 | 19.4 | 17.1 | 16.3 | 17.9 | 15 | 18.1 | 17.4 | 12.8 | 8.9 | 8.8 | 13.7 | 13.6 | 14 |
| Minimum temperature | 10.6 | 14.8 | 16.9 | 17.3 | 16 | 14.8 | 14.7 | 16.9 | 17.5 | 15.1 | 14.4 | 14 | 14.8 | 15.4 | 16 | 15.9 | 16.1 | 16.5 | 17.5 | 16 | 15.4 | 17 | 14.7 | 17.5 | 16.3 | 13.2 | 9.9 | 9.9 | 13.3 | 13.2 | 13.8 |
| Apparent min temperature | 21.4 | 25 | 25.3 | 25.7 | 22.1 | 17.5 | 20.1 | 22.6 | 24.8 | 19.1 | 17.4 | 21.3 | 18.3 | 23 | 22.9 | 20.8 | 24.6 | 26.4 | 23.8 | 24.9 | 24.5 | 25 | 24.4 | 24.8 | 21.7 | 15.1 | 13.5 | 16.7 | 18.4 | 20 | 22.2 |
| 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) | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 |
| Sunshine duration (h) | 12.8 | 12.8 | 12.5 | 12.7 | 9.2 | 1.2 | 10.8 | 12.9 | 12.6 | 2.2 | 0 | 12.6 | 4.1 | 12.9 | 11.5 | 9 | 12.6 | 12.8 | 11.9 | 13.1 | 11.7 | 10.4 | 11.4 | 9.4 | 2.9 | 0 | 3.3 | 10.9 | 11.6 | 12.5 | 13 |
| Precipitation (mm) | 0 | 0 | 0 | 3.3 | 23.9 | 6.1 | 13.2 | 0.2 | 0 | 35.4 | 14.1 | 0.8 | 5.2 | 0 | 21.5 | 5 | 0 | 0 | 1.8 | 0 | 10.8 | 0.4 | 0.1 | 13.9 | 8.9 | 10.6 | 3.2 | 5.9 | 0.6 | 0.2 | 0 |
| Precipitation hours | 0 | 0 | 0 | 4 | 8 | 20 | 15 | 1 | 0 | 16 | 17 | 2 | 11 | 0 | 12 | 9 | 0 | 0 | 8 | 0 | 4 | 1 | 1 | 8 | 15 | 20 | 10 | 8 | 6 | 2 | 0 |
| Wind speed (m/s) | 10.4 | 16.4 | 15 | 13.5 | 14.8 | 14.3 | 18.2 | 29 | 21.8 | 11.6 | 10 | 17 | 14.7 | 19.9 | 25.3 | 8.7 | 9 | 11.2 | 12.9 | 15.6 | 27.6 | 13.3 | 18.8 | 18.7 | 10.6 | 22.9 | 12.6 | 18.4 | 16.1 | 14.8 | 18.5 |
In December 2023, the highest daytime temperature in Newcastle was 34.7°C.
While the minimum temperature at night dropped to 9.9°C.
The average nighttime and daytime temperatures during December in Newcastle are 15°C and 27.8°C respectively.
The precipitation sum in December is about 185 mm.