Average annual temperature is 27.0 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 82 days
Number of rainy days: 283 days
Look at detailed online map of Wilachchiya
* Weather data for Wilachchiya 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) | 30.0 | 32.6 | 35.6 | 36.7 | 35.2 | 35.2 | 37.5 | 38.2 | 34.2 | 34.1 | 31.8 | 31.2 |
| Average daytime temperature (°C) | 28.7 | 30.4 | 32.7 | 34.5 | 32.3 | 33.5 | 33.3 | 35.7 | 32.2 | 31.5 | 30.1 | 29.3 |
| Average temperature (°C) | 24.1 | 25.1 | 26.9 | 28.0 | 28.1 | 29.1 | 28.7 | 29.4 | 27.7 | 26.3 | 25.5 | 25.5 |
| Average night temperature (°C) | 20.7 | 21.1 | 23.1 | 24.0 | 25.3 | 26.1 | 25.8 | 25.5 | 24.7 | 23.5 | 23.0 | 23.1 |
| Absolute minimum temperature (°C) | 18.5 | 19.0 | 21.5 | 22.4 | 23.7 | 25.0 | 25.0 | 24.9 | 23.7 | 22.3 | 22.3 | 22.5 |
| 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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 | 9.8 | 10.8 | 10.3 | 9.0 | 10.5 | 9.5 | 10.9 | 9.7 | 8.8 | 6.9 | 7.5 |
| Precipitation (mm) | 75 | 141 | 78 | 123 | 110 | 28 | 46 | 40 | 73 | 293 | 451 | 277 |
| Sunny days | 17 | 15 | 2 | 6 | 5 | 9 | 10 | 17 | 0 | 0 | 0 | 1 |
| Rainy days | 14 | 13 | 29 | 24 | 26 | 21 | 21 | 14 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Wilachchiya is at