Average temperature in December is 7.2 °C
Average daytime temperature is 12.8 °C
Average night temperature is 2.5 °C
Absolute maximum temperature: 19.4 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 20
Number of rainy days: 11
Number of snow days:
Precipitation sum: 33 mm
* Weather data for Sayama Japan 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 | 10.1 | 11.5 | 12.3 | 13.1 | 10.7 | 16.1 | 17.1 | 17.5 | 16.8 | 19.4 | 15.1 | 17.4 | 13.4 | 12.8 | 12.3 | 18.8 | 10 | 10.2 | 8.1 | 12.6 | 10.6 | 8.9 | 8.4 | 7.9 | 10.7 | 12.4 | 10.9 | 10 | 14.4 | 13.5 | 12.9 |
| Apparent max temperature | 6.4 | 8.1 | 10 | 9.5 | 7.1 | 13.7 | 14 | 14 | 14.6 | 16.9 | 13.1 | 15.2 | 7.7 | 9.8 | 11.6 | 18.8 | 4.9 | 5.4 | 4.5 | 9.4 | 7.1 | 4.2 | 3.9 | 4 | 6.6 | 8.2 | 5.4 | 7 | 10.3 | 10.3 | 10.8 |
| Mean temperature | 5.6 | 5.9 | 7.8 | 6.7 | 8 | 9.5 | 9.7 | 10.1 | 11.2 | 12.1 | 11.5 | 11.9 | 7.7 | 8.8 | 9.8 | 13.6 | 4.8 | 4 | 4.1 | 5.8 | 3.8 | 2.1 | 2.9 | 2.4 | 4.4 | 6.3 | 5.6 | 4.9 | 6.6 | 7.4 | 9.4 |
| Apparent mean temperature | -3.2 | -3.2 | -0.8 | -2.4 | 3.7 | 0.6 | -0.9 | 1.3 | 4.7 | 4.2 | 8 | 1.2 | 0.1 | 3.9 | 5.3 | 2.9 | -6 | -3.7 | -2 | -2.7 | -7.6 | -7.6 | -5.9 | -6.6 | -4.2 | -2.7 | -2.4 | -1.8 | -2.1 | 0.8 | 0.4 |
| Minimum temperature | 0.2 | 0.4 | 2.8 | 1.4 | 6.4 | 3.5 | 2 | 4.1 | 7 | 7.1 | 9.7 | 6.9 | 3 | 6.9 | 7.7 | 6.6 | -1.9 | 0.1 | 1.1 | 0.5 | -3.5 | -3.8 | -2.1 | -2.9 | -0.3 | 0.9 | 1.2 | 1.5 | 1.6 | 3.6 | 5 |
| Apparent min temperature | 2.1 | 2.6 | 3.8 | 3.2 | 5.1 | 6.9 | 5.7 | 7.1 | 8.9 | 9.8 | 10.1 | 6.9 | 3.5 | 6 | 8 | 12.5 | -1.4 | -0.1 | 0.9 | 2.8 | -0.7 | -2.7 | -1.2 | -1.2 | 0.6 | 2.5 | 0.8 | 1.8 | 3.2 | 4.6 | 5.2 |
| 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) | 9.9 | 9.9 | 9.9 | 9.9 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.8 | 9.8 |
| Sunshine duration (h) | 6.5 | 8.9 | 8.9 | 8 | 0.8 | 8.9 | 8.9 | 8.9 | 8.8 | 8 | 2.5 | 8 | 8.8 | 8 | 4.2 | 7.6 | 8.7 | 8 | 5.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.7 | 8.7 | 8.7 | 8.5 | 8.7 | 8.7 | 8 | 7.7 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 5.4 | 0 | 0.1 | 0 | 0 | 0.6 | 21.9 | 0.3 | 0 | 0.1 | 1.5 | 0.7 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.3 | 0.6 |
| Precipitation hours | 0 | 0 | 0 | 0 | 8 | 0 | 1 | 0 | 0 | 3 | 15 | 2 | 0 | 1 | 6 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 |
| Wind speed (m/s) | 13.4 | 9.2 | 22.5 | 12.2 | 12.7 | 11.9 | 27.7 | 15.9 | 9.2 | 11.9 | 10.5 | 39.6 | 24.2 | 10.1 | 19.7 | 31.5 | 35.3 | 21.2 | 8.3 | 11.8 | 28.5 | 23.5 | 14.8 | 11.4 | 13.5 | 19.3 | 28.7 | 7.9 | 14 | 9.4 | 35.5 |
In December 2023, the highest daytime temperature in Sayama was 19.4°C.
While the minimum temperature at night dropped to -3.8°C.
The average nighttime and daytime temperatures during December in Sayama are 2.5°C and 12.8°C respectively.
The precipitation sum in December is about 33 mm.