Average annual temperature is 27.9 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: 20.5 °C
Number of sunny days: 111 days
Number of rainy days: 254 days
Look at detailed online map of Kethuru
* Weather data for Kethuru 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) | 28.3 | 30.2 | 33.5 | 35.6 | 34.1 | 34.8 | 36.0 | 36.4 | 33.8 | 32.8 | 30.6 | 30.2 |
| Average daytime temperature (°C) | 27.6 | 28.1 | 31.1 | 33.3 | 31.9 | 32.5 | 32.1 | 33.3 | 31.2 | 31.3 | 29.3 | 28.5 |
| Average temperature (°C) | 25.4 | 25.6 | 27.8 | 29.3 | 29.3 | 29.7 | 29.2 | 29.5 | 28.7 | 27.9 | 26.2 | 26.2 |
| Average night temperature (°C) | 23.4 | 23.1 | 25.0 | 25.9 | 27.3 | 27.8 | 27.1 | 26.7 | 26.7 | 25.0 | 23.7 | 24.4 |
| Absolute minimum temperature (°C) | 21.7 | 20.5 | 23.3 | 24.4 | 24.0 | 25.6 | 26.3 | 26.1 | 24.4 | 23.4 | 22.6 | 23.8 |
| 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) | 11.6 | 11.8 | 12.1 | 12.3 | 12.6 | 12.7 | 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) | 9.8 | 10.2 | 11.1 | 11.0 | 9.5 | 10.2 | 9.4 | 11.3 | 10.6 | 10.7 | 8.1 | 8.1 |
| Precipitation (mm) | 42 | 132 | 22 | 53 | 66 | 41 | 59 | 42 | 124 | 202 | 620 | 270 |
| Sunny days | 13 | 16 | 9 | 13 | 16 | 14 | 8 | 15 | 3 | 3 | 0 | 1 |
| Rainy days | 18 | 12 | 22 | 17 | 15 | 16 | 23 | 16 | 27 | 28 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kethuru is at