Average annual temperature is 26.1 °C
Absolute maximum temperature: 39.5 °C
Absolute minimum temperature: 19.1 °C
Number of sunny days: 45 days
Number of rainy days: 320 days
Look at detailed online map of Welikatuwa
* Weather data for Welikatuwa 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) | 29.1 | 30.2 | 32.6 | 34.4 | 35.4 | 37.2 | 38.4 | 39.5 | 34.7 | 30.7 | 30.1 | 29.1 |
| Average daytime temperature (°C) | 27.4 | 27.9 | 29.4 | 31.6 | 31.9 | 35.3 | 34.9 | 37.1 | 32.0 | 29.4 | 28.7 | 27.9 |
| Average temperature (°C) | 23.7 | 24.1 | 25.1 | 26.3 | 26.9 | 28.7 | 28.4 | 29.4 | 26.6 | 24.9 | 24.5 | 24.4 |
| Average night temperature (°C) | 20.9 | 21.1 | 21.9 | 22.5 | 23.2 | 23.9 | 23.5 | 23.7 | 23.1 | 22.2 | 22.1 | 22.4 |
| Absolute minimum temperature (°C) | 19.1 | 19.3 | 21.2 | 21.1 | 22.1 | 22.8 | 22.1 | 22.8 | 22.1 | 21.0 | 21.3 | 21.2 |
| 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 | 11.7 |
| 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) | 9.2 | 9.1 | 9.3 | 9.9 | 9.4 | 10.6 | 9.8 | 10.9 | 9.4 | 8.5 | 7.3 | 7.4 |
| Precipitation (mm) | 79 | 137 | 109 | 133 | 144 | 65 | 46 | 32 | 118 | 328 | 493 | 411 |
| Sunny days | 10 | 8 | 3 | 1 | 9 | 1 | 3 | 8 | 2 | 0 | 0 | 0 |
| Rainy days | 21 | 20 | 28 | 29 | 22 | 29 | 28 | 23 | 28 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Welikatuwa is at