Average annual temperature is 24.6 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: 16.7 °C
Number of sunny days: 37 days
Number of rainy days: 328 days
Look at detailed online map of Welkaniya
* Weather data for Welkaniya Sri Lanka is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.1 | 32.0 | 32.8 | 33.9 | 32.4 | 30.9 | 30.1 | 32.4 | 29.4 | 28.7 | 28.7 | 28.7 |
| Average daytime temperature (°C) | 28.5 | 29.4 | 30.4 | 31.4 | 29.5 | 29.7 | 28.0 | 30.8 | 27.6 | 27.4 | 27.8 | 27.4 |
| Average temperature (°C) | 23.4 | 24.1 | 24.7 | 25.5 | 25.6 | 25.7 | 24.9 | 26.0 | 24.2 | 23.8 | 23.7 | 23.8 |
| Average night temperature (°C) | 19.3 | 20.0 | 20.9 | 21.6 | 22.9 | 23.0 | 22.6 | 22.9 | 22.0 | 21.4 | 21.1 | 21.1 |
| Absolute minimum temperature (°C) | 16.7 | 17.8 | 19.5 | 20.2 | 21.5 | 21.7 | 21.5 | 22.3 | 20.5 | 19.7 | 20.3 | 19.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.7 | 9.5 | 9.7 | 9.9 | 8.7 | 10.5 | 9.3 | 10.9 | 7.9 | 7.0 | 7.3 | 7.7 |
| Precipitation (mm) | 70 | 131 | 149 | 121 | 86 | 37 | 79 | 43 | 243 | 528 | 586 | 254 |
| Sunny days | 9 | 6 | 2 | 1 | 5 | 0 | 2 | 8 | 0 | 0 | 0 | 4 |
| Rainy days | 22 | 22 | 29 | 29 | 26 | 30 | 29 | 23 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Welkaniya is at