Average annual temperature is 27.2 °C
Absolute maximum temperature: 38.7 °C
Absolute minimum temperature: 20.8 °C
Number of sunny days: 35 days
Number of rainy days: 330 days
Look at detailed online map of Katagamuwa
* Weather data for Katagamuwa 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) | 31.9 | 32.4 | 34.1 | 35.4 | 37.7 | 38.5 | 38.7 | 38.7 | 32.8 | 31.4 | 31.0 | 30.7 |
| Average daytime temperature (°C) | 29.9 | 30.5 | 31.7 | 33.2 | 33.0 | 36.2 | 35.7 | 36.6 | 31.2 | 30.0 | 29.6 | 29.3 |
| Average temperature (°C) | 25.4 | 25.7 | 26.6 | 27.6 | 28.1 | 29.9 | 29.4 | 29.8 | 26.8 | 25.7 | 25.4 | 25.6 |
| Average night temperature (°C) | 22.2 | 22.3 | 23.0 | 23.7 | 24.9 | 25.7 | 25.3 | 25.4 | 24.0 | 23.0 | 22.9 | 23.3 |
| Absolute minimum temperature (°C) | 20.8 | 20.8 | 22.0 | 22.5 | 23.5 | 24.8 | 23.6 | 24.2 | 22.8 | 22.0 | 22.4 | 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| 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) | 9.4 | 9.7 | 9.9 | 9.8 | 9.4 | 10.8 | 10.0 | 11.1 | 9.0 | 7.9 | 7.1 | 7.8 |
| Precipitation (mm) | 74 | 94 | 136 | 126 | 181 | 40 | 35 | 53 | 140 | 365 | 506 | 328 |
| Sunny days | 9 | 7 | 0 | 0 | 5 | 2 | 3 | 7 | 0 | 0 | 0 | 2 |
| Rainy days | 22 | 21 | 31 | 30 | 26 | 28 | 28 | 24 | 30 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Katagamuwa is at