Average annual temperature is 26.5 °C
Absolute maximum temperature: 39.1 °C
Absolute minimum temperature: 19.8 °C
Number of sunny days: 41 days
Number of rainy days: 324 days
Look at detailed online map of Katharagama
* Weather data for Katharagama 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 | 30.5 | 33.5 | 35.7 | 36.9 | 38.3 | 37.9 | 39.1 | 33.3 | 30.9 | 30.1 | 29.5 |
| Average daytime temperature (°C) | 28.4 | 28.7 | 30.4 | 32.5 | 32.4 | 36.1 | 35.1 | 36.5 | 31.2 | 29.5 | 28.6 | 28.2 |
| Average temperature (°C) | 24.3 | 24.6 | 25.7 | 26.9 | 27.4 | 29.5 | 28.9 | 29.4 | 26.5 | 25.1 | 24.7 | 24.9 |
| Average night temperature (°C) | 21.3 | 21.6 | 22.2 | 23.0 | 24.1 | 25.2 | 24.8 | 24.9 | 23.6 | 22.5 | 22.4 | 22.7 |
| Absolute minimum temperature (°C) | 19.8 | 20.0 | 21.0 | 21.6 | 22.8 | 24.1 | 23.1 | 23.6 | 22.5 | 21.5 | 21.7 | 21.9 |
| 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 | 11.7 |
| 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) | 9.3 | 9.9 | 10.0 | 9.9 | 9.5 | 10.7 | 9.8 | 11.1 | 9.2 | 8.3 | 7.5 | 7.7 |
| Precipitation (mm) | 95 | 155 | 156 | 125 | 180 | 35 | 57 | 45 | 104 | 339 | 520 | 351 |
| Sunny days | 8 | 9 | 3 | 0 | 7 | 2 | 2 | 7 | 1 | 0 | 0 | 2 |
| Rainy days | 23 | 19 | 28 | 30 | 24 | 28 | 29 | 24 | 29 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Katharagama is at