Average temperature in December is 25.9 °C
Average daytime temperature is 29.6 °C
Average night temperature is 23.4 °C
Absolute maximum temperature: 32 °C
Absolute minimum temperature: 22.4 °C
Number of sunny days: 1
Number of rainy days: 30
Number of snow days:
Precipitation sum: 411 mm
* Weather data for Colombo Sri Lanka 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 | 28.9 | 28.2 | 27.7 | 26.7 | 27.6 | 29 | 29.6 | 29.2 | 29 | 28.8 | 29.3 | 29.6 | 30.9 | 30.1 | 29.4 | 28.2 | 29.3 | 29.2 | 30.1 | 30.3 | 30.4 | 31.9 | 30.4 | 30.9 | 32 | 31.3 | 30.4 | 29.8 | 27.8 | 30.6 | 30.8 |
| Apparent max temperature | 34.2 | 32.6 | 33 | 31.1 | 32.8 | 34.3 | 36.4 | 36 | 36 | 35.3 | 35.8 | 36.9 | 35.7 | 35.3 | 34.2 | 33.4 | 36.7 | 37.3 | 37.5 | 37.8 | 37.8 | 36.6 | 36.6 | 38.2 | 37.7 | 35.5 | 33.9 | 36.3 | 34.9 | 37.1 | 37.1 |
| Mean temperature | 25.5 | 25.8 | 25.6 | 25.4 | 25.5 | 26.2 | 26.2 | 25.4 | 25.6 | 25.3 | 25.5 | 25.1 | 26.9 | 25.8 | 25.5 | 25.2 | 25.4 | 25.4 | 25.8 | 26 | 26.4 | 26.8 | 26.6 | 26.4 | 26.4 | 27.2 | 27 | 26.3 | 25.3 | 25.5 | 26.1 |
| Apparent mean temperature | 27.9 | 28.7 | 28.5 | 28 | 27.4 | 27.8 | 27.2 | 27.7 | 27.7 | 27.9 | 27.3 | 26.8 | 26.8 | 26.5 | 27.5 | 27.2 | 27.7 | 28.4 | 27.9 | 27 | 26.8 | 26.6 | 25.9 | 27.3 | 25.8 | 25.8 | 26.5 | 28.6 | 27.2 | 27.1 | 27 |
| Minimum temperature | 23.5 | 23.9 | 24.1 | 24 | 23.7 | 23.7 | 23.4 | 23.3 | 23.2 | 23.2 | 22.6 | 22.4 | 23.3 | 23.2 | 23.4 | 23.2 | 23.2 | 23.5 | 23.6 | 23.1 | 23 | 23.6 | 23.6 | 23.4 | 22.9 | 23.1 | 24.3 | 23.9 | 23.5 | 23.2 | 23.2 |
| Apparent min temperature | 30.1 | 30.8 | 30.4 | 29.8 | 29.9 | 31 | 31.1 | 30.4 | 31 | 30.8 | 30.8 | 30.3 | 30.2 | 30 | 30.1 | 30 | 30.9 | 30.9 | 31 | 31.3 | 31.7 | 31.2 | 31.4 | 31.5 | 31.2 | 30.1 | 30.2 | 31.6 | 30.5 | 30.4 | 31.2 |
| 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) | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 |
| Sunshine duration (h) | 5.9 | 3.8 | 7 | 1.8 | 7 | 7.7 | 9.6 | 6.8 | 7.1 | 7.5 | 10.4 | 6.1 | 9.9 | 7.9 | 6.3 | 3.5 | 7.5 | 7.2 | 7.5 | 8.6 | 10.9 | 10 | 10.4 | 8.8 | 10.8 | 10.8 | 10.8 | 8.3 | 2.9 | 7.6 | 8.5 |
| Precipitation (mm) | 21.4 | 6 | 30.1 | 28.1 | 7.5 | 1.8 | 11 | 25 | 8.5 | 17.4 | 7.8 | 35.5 | 2 | 17.7 | 40.3 | 11.4 | 11.7 | 22.6 | 5.3 | 16.3 | 1.2 | 0 | 1.5 | 13.4 | 0.9 | 0.4 | 1 | 23.4 | 6.1 | 13.9 | 21.6 |
| Precipitation hours | 19 | 15 | 24 | 24 | 19 | 8 | 11 | 14 | 6 | 11 | 11 | 11 | 5 | 12 | 15 | 9 | 8 | 19 | 8 | 5 | 4 | 0 | 2 | 3 | 5 | 4 | 3 | 10 | 16 | 10 | 15 |
| Wind speed (m/s) | 17.2 | 12.5 | 15.3 | 19.5 | 17.2 | 16.6 | 13.1 | 14.3 | 9.4 | 9.8 | 11.9 | 12.2 | 17.3 | 25.6 | 16.3 | 13.1 | 15.5 | 13.2 | 10.7 | 10.5 | 10.8 | 13.2 | 13.5 | 10.9 | 12.5 | 20.9 | 28.4 | 12.2 | 10.4 | 16.7 | 17.3 |
In December 2023, the highest daytime temperature in Colombo was 32°C.
While the minimum temperature at night dropped to 22.4°C.
The average nighttime and daytime temperatures during December in Colombo are 23.4°C and 29.6°C respectively.
The precipitation sum in December is about 411 mm.