Average annual temperature is 27.1 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 19.1 °C
Number of sunny days: 72 days
Number of rainy days: 293 days
Look at detailed online map of Namalwatta
* Weather data for Namalwatta 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 | 30.6 | 34.4 | 37.0 | 37.1 | 36.9 | 38.4 | 38.9 | 36.6 | 34.2 | 32.0 | 32.4 |
| Average daytime temperature (°C) | 27.7 | 28.9 | 31.4 | 33.9 | 34.0 | 35.3 | 35.1 | 36.8 | 34.2 | 32.3 | 29.7 | 28.9 |
| Average temperature (°C) | 24.4 | 24.9 | 26.5 | 27.7 | 28.2 | 29.7 | 29.3 | 29.2 | 28.0 | 26.3 | 25.3 | 25.4 |
| Average night temperature (°C) | 21.6 | 21.4 | 22.9 | 23.7 | 24.9 | 26.1 | 25.9 | 25.1 | 24.7 | 23.2 | 22.8 | 23.1 |
| Absolute minimum temperature (°C) | 20.2 | 19.1 | 22.1 | 21.7 | 23.1 | 24.8 | 25.0 | 24.0 | 23.4 | 22.5 | 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) | 11.7 | 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 | 10.0 | 10.8 | 10.6 | 9.2 | 10.7 | 9.4 | 10.8 | 9.6 | 9.8 | 7.7 | 8.1 |
| Precipitation (mm) | 143 | 91 | 65 | 96 | 91 | 19 | 52 | 98 | 147 | 523 | 640 | 382 |
| Sunny days | 12 | 12 | 7 | 6 | 8 | 7 | 8 | 8 | 3 | 1 | 0 | 0 |
| Rainy days | 19 | 16 | 24 | 24 | 23 | 23 | 23 | 23 | 27 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Namalwatta is at