Average annual temperature is 27.2 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: 20.6 °C
Number of sunny days: 47 days
Number of rainy days: 318 days
Look at detailed online map of Kethsirigama
* Weather data for Kethsirigama 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) | 29.5 | 30.9 | 33.0 | 34.7 | 35.7 | 36.8 | 38.7 | 38.8 | 36.0 | 32.5 | 31.2 | 31.2 |
| Average daytime temperature (°C) | 27.9 | 28.4 | 30.2 | 32.1 | 32.9 | 35.3 | 35.7 | 37.4 | 33.5 | 30.7 | 29.7 | 28.8 |
| Average temperature (°C) | 24.6 | 25.1 | 26.3 | 27.7 | 28.3 | 29.5 | 29.3 | 30.2 | 27.8 | 26.1 | 25.6 | 25.4 |
| Average night temperature (°C) | 22.1 | 22.7 | 23.6 | 24.7 | 25.4 | 25.6 | 24.8 | 25.3 | 24.7 | 23.7 | 23.4 | 23.4 |
| Absolute minimum temperature (°C) | 20.6 | 20.9 | 22.2 | 23.6 | 24.2 | 25.0 | 23.8 | 23.8 | 23.7 | 23.0 | 22.7 | 22.7 |
| 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) | 8.7 | 8.9 | 9.5 | 10.2 | 9.5 | 10.6 | 9.5 | 10.9 | 9.4 | 8.3 | 7.5 | 6.9 |
| Precipitation (mm) | 140 | 159 | 152 | 107 | 142 | 98 | 45 | 63 | 233 | 430 | 498 | 528 |
| Sunny days | 8 | 6 | 6 | 6 | 7 | 0 | 7 | 7 | 0 | 0 | 0 | 0 |
| Rainy days | 23 | 22 | 25 | 24 | 24 | 30 | 24 | 24 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kethsirigama is at