Average annual temperature is 26.5 °C
Absolute maximum temperature: 38.5 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 58 days
Number of rainy days: 307 days
Look at detailed online map of Namandiyagama
* Weather data for Namandiyagama 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) | 29.8 | 30.4 | 34.3 | 36.1 | 36.9 | 36.8 | 36.7 | 38.5 | 33.7 | 30.7 | 29.7 | 29.7 |
| Average daytime temperature (°C) | 28.6 | 29.0 | 30.4 | 32.6 | 32.0 | 35.1 | 33.2 | 36.0 | 31.2 | 28.9 | 28.4 | 28.2 |
| Average temperature (°C) | 24.6 | 25.0 | 26.1 | 27.1 | 27.2 | 28.9 | 27.8 | 29.2 | 26.6 | 25.1 | 24.9 | 25.1 |
| Average night temperature (°C) | 21.1 | 21.5 | 22.7 | 23.1 | 23.2 | 24.1 | 23.3 | 23.8 | 23.4 | 22.6 | 22.4 | 22.8 |
| Absolute minimum temperature (°C) | 17.5 | 18.1 | 21.7 | 21.1 | 21.8 | 22.8 | 22.3 | 22.5 | 21.9 | 21.6 | 20.4 | 20.8 |
| 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) | 11.8 | 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) | 9.4 | 9.8 | 10.0 | 10.1 | 9.3 | 10.7 | 9.9 | 11.0 | 9.3 | 8.3 | 7.7 | 8.1 |
| Precipitation (mm) | 60 | 115 | 85 | 137 | 125 | 74 | 96 | 31 | 89 | 364 | 522 | 246 |
| Sunny days | 15 | 10 | 3 | 1 | 10 | 3 | 4 | 9 | 1 | 0 | 0 | 2 |
| Rainy days | 16 | 18 | 28 | 29 | 21 | 27 | 27 | 22 | 29 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Namandiyagama is at