Average temperature in December is 7.3 °C
Average daytime temperature is 9 °C
Average night temperature is 5.3 °C
Absolute maximum temperature: 12.1 °C
Absolute minimum temperature: -4.1 °C
Number of sunny days: 1
Number of rainy days: 30
Number of snow days:
Precipitation sum: 264 mm
* Weather data for Ystrad Mynach United Kingdom 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 | 2.7 | 1.6 | 6.4 | 7.4 | 5.5 | 6.1 | 9.6 | 8.9 | 12.1 | 11.2 | 9.9 | 9.6 | 7.6 | 10 | 10.2 | 10.5 | 9.7 | 11.3 | 11.2 | 10.2 | 11.5 | 9.9 | 10.2 | 11.4 | 11 | 7.6 | 12.1 | 9.6 | 7.7 | 10.3 | 7.4 |
| Apparent max temperature | -1.3 | -1.4 | 4.7 | 5.6 | 2.5 | 1.5 | 6.7 | 5.2 | 8 | 7 | 7.2 | 7.5 | 4.2 | 7.6 | 7.8 | 8 | 6.5 | 8.2 | 9.6 | 6.6 | 6.7 | 5.2 | 5 | 8.2 | 7.8 | 6.2 | 7.3 | 4 | 3.8 | 5.6 | 2.7 |
| Mean temperature | -0.1 | -1.4 | 4.6 | 5.6 | 3.5 | 2.5 | 7.9 | 8 | 9.1 | 9 | 8.4 | 8.4 | 5.9 | 6.2 | 7.2 | 9.9 | 9 | 10.5 | 8.6 | 8.5 | 10.2 | 9 | 9.2 | 11 | 10.1 | 6.5 | 9.3 | 8.5 | 6.7 | 7.6 | 6.3 |
| Apparent mean temperature | -5.7 | -7.6 | -1.4 | -0.9 | -2.3 | -3.9 | 1.8 | 2.8 | 1.5 | 2.2 | 3 | 4.3 | -1.4 | -2.2 | 1 | 6.2 | 4.5 | 5.3 | 1.4 | 1.7 | 3.3 | 2.4 | 2.1 | 5.5 | 3 | 0.8 | 0.9 | 1.6 | 0.7 | 0.9 | -0.3 |
| Minimum temperature | -2.2 | -4.1 | 1.7 | 3.3 | 0.9 | -0.6 | 6.4 | 7.4 | 7.4 | 7.6 | 6.8 | 7.3 | 2.1 | 0.8 | 3.7 | 9.4 | 8.3 | 9 | 5.6 | 6.1 | 8.4 | 7.9 | 7.9 | 10.4 | 7.7 | 5.4 | 6.5 | 7.6 | 5.3 | 4.8 | 5.3 |
| Apparent min temperature | -4.3 | -4.8 | 2.1 | 2.1 | -0.1 | -1.2 | 3.9 | 4 | 4.3 | 4.1 | 4.8 | 5.5 | 1.8 | 3.7 | 4.3 | 6.7 | 5.1 | 7.1 | 5.3 | 4.1 | 4.8 | 4.2 | 3.8 | 6.9 | 6.4 | 3.1 | 4.6 | 2.7 | 2.5 | 4 | 1.1 |
| 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) | 8.2 | 8.1 | 8.1 | 8.1 | 8.1 | 8 | 8 | 8 | 8 | 7.9 | 7.9 | 7.9 | 7.9 | 7.9 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.9 | 7.9 | 7.9 |
| Sunshine duration (h) | 6.8 | 6.6 | 0.5 | 0 | 3.4 | 0 | 0 | 1 | 4 | 0.9 | 6.3 | 0 | 5.3 | 4.4 | 6 | 0 | 0.5 | 0 | 0.2 | 1 | 2.7 | 0.3 | 4.4 | 0 | 0 | 2 | 0 | 0.2 | 3.6 | 0 | 3.3 |
| Precipitation (mm) | 0 | 1.1 | 15 | 15.8 | 0.1 | 4.4 | 28.6 | 4.8 | 17.4 | 16.7 | 1.9 | 16.5 | 0.3 | 1 | 0.2 | 0.4 | 0.1 | 13.6 | 12.6 | 0.8 | 0.2 | 0.1 | 2.3 | 15.8 | 7.8 | 3.4 | 34.3 | 18.4 | 5.7 | 17.2 | 7 |
| Precipitation hours | 0 | 4 | 20 | 12 | 1 | 7 | 19 | 21 | 11 | 17 | 3 | 19 | 2 | 5 | 2 | 4 | 1 | 22 | 14 | 8 | 1 | 1 | 6 | 23 | 16 | 4 | 24 | 20 | 10 | 19 | 15 |
| Wind speed (m/s) | 17 | 13.2 | 17.1 | 24.1 | 19.8 | 23.9 | 26.6 | 29.1 | 37.4 | 43.3 | 35.9 | 25.8 | 24.6 | 16.4 | 17.4 | 25.8 | 26.3 | 26.1 | 25.3 | 29.2 | 41.5 | 36.8 | 41.3 | 36.4 | 28.3 | 28.5 | 38.5 | 45.6 | 27.3 | 31.1 | 37.8 |
In December 2023, the highest daytime temperature in Ystrad Mynach was 12.1°C.
While the minimum temperature at night dropped to -4.1°C.
The average nighttime and daytime temperatures during December in Ystrad Mynach are 5.3°C and 9°C respectively.
The precipitation sum in December is about 264 mm.