Average temperature in December is 7.9 °C
Average daytime temperature is 9.4 °C
Average night temperature is 6.1 °C
Absolute maximum temperature: 12.7 °C
Absolute minimum temperature: -1 °C
Number of sunny days: 1
Number of rainy days: 30
Number of snow days:
Precipitation sum: 258 mm
* Weather data for Caernarfon 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 | 3.8 | 4 | 4.7 | 5.8 | 6.8 | 6.3 | 10.5 | 9.9 | 12 | 11.2 | 9.6 | 10 | 8 | 9.8 | 11.1 | 11.1 | 11.1 | 12.1 | 10.1 | 10.9 | 11.3 | 10 | 11.9 | 12.7 | 10.2 | 8 | 12 | 9.9 | 7.9 | 10 | 7.7 |
| Apparent max temperature | 0.9 | -0.8 | 2.2 | 3 | 4 | 0.3 | 6.2 | 5.2 | 7 | 6.8 | 6.5 | 8.6 | 5.4 | 6.7 | 7.8 | 7.3 | 6.9 | 9.9 | 9.2 | 6.6 | 6.4 | 4.9 | 7.6 | 8.7 | 6 | 5.7 | 6.4 | 4 | 2.5 | 5.1 | 2.7 |
| Mean temperature | 0.2 | 2.3 | 3.4 | 4.4 | 4.2 | 3.4 | 8.9 | 9.2 | 9.8 | 9.2 | 8.7 | 8.6 | 6.3 | 8.5 | 9.4 | 10.5 | 10.2 | 11.5 | 8.4 | 9.5 | 10.2 | 9.4 | 10 | 11.6 | 9.5 | 6.7 | 9.3 | 9 | 6.9 | 7.3 | 7 |
| Apparent mean temperature | -4.4 | -4.2 | -1.1 | -2.3 | -2.7 | -3.1 | -0.6 | 4 | 1 | 1.7 | 3.1 | 4.2 | 1.2 | 1.2 | 4.8 | 5.3 | 3.9 | 7.1 | 2 | 2.2 | 3.2 | 2.9 | 4.5 | 5.2 | 2.4 | 1.5 | 0.1 | -0.3 | -0.1 | 0 | 0.4 |
| Minimum temperature | -1 | -0.6 | 2.6 | 2.7 | 0.2 | 0.2 | 6.7 | 8.4 | 8.7 | 7.7 | 7.5 | 6.4 | 3.5 | 5.1 | 7.9 | 9.9 | 9.2 | 10.6 | 7.5 | 7.7 | 8.8 | 8.8 | 9.2 | 9.7 | 7.9 | 4.4 | 5.9 | 7.9 | 5.9 | 5.2 | 6 |
| Apparent min temperature | -3 | -2.2 | 0.3 | 0.3 | 1.1 | -1.5 | 3.7 | 4.6 | 4 | 4.1 | 4.9 | 5.9 | 3 | 5.2 | 6.1 | 6.7 | 5.2 | 8.6 | 4.7 | 4.7 | 4.9 | 4 | 5.5 | 7.3 | 4.9 | 3.3 | 2.8 | 2.3 | 1 | 2.4 | 1.5 |
| 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) | 7.9 | 7.9 | 7.9 | 7.8 | 7.8 | 7.8 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 |
| Sunshine duration (h) | 6.4 | 5.5 | 1 | 0 | 6 | 3.7 | 0 | 0 | 2.7 | 3.1 | 5.8 | 0.4 | 5.1 | 3.8 | 5.5 | 0 | 0 | 0 | 3.3 | 0 | 3.7 | 0 | 0.2 | 0 | 0 | 3.1 | 0.1 | 4.8 | 0.9 | 0 | 2.1 |
| Precipitation (mm) | 0 | 9.1 | 4.8 | 13.2 | 1.4 | 3.2 | 12.8 | 6.9 | 14.6 | 12.5 | 6.2 | 3.6 | 1.8 | 4.6 | 0.4 | 1.8 | 6.5 | 6.1 | 7.1 | 9.8 | 12 | 8.5 | 8.5 | 7.7 | 4 | 2.3 | 34.8 | 11.6 | 2.6 | 26.7 | 12.8 |
| Precipitation hours | 0 | 16 | 15 | 24 | 7 | 6 | 19 | 13 | 22 | 18 | 17 | 10 | 11 | 15 | 4 | 15 | 15 | 20 | 17 | 24 | 24 | 20 | 20 | 22 | 15 | 6 | 22 | 19 | 11 | 21 | 16 |
| Wind speed (m/s) | 7 | 25.1 | 18.1 | 23.3 | 15.9 | 38.8 | 40.1 | 33.3 | 49.3 | 50.9 | 32.7 | 26.7 | 24.9 | 22 | 25.5 | 30.3 | 35.3 | 29.9 | 30.1 | 32.1 | 38.4 | 39.5 | 34.5 | 35.1 | 30.6 | 29.9 | 47.8 | 57.1 | 37.5 | 39.6 | 36.8 |
In December 2023, the highest daytime temperature in Caernarfon was 12.7°C.
While the minimum temperature at night dropped to -1°C.
The average nighttime and daytime temperatures during December in Caernarfon are 6.1°C and 9.4°C respectively.
The precipitation sum in December is about 258 mm.