Average annual temperature is 26.8 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: 18.1 °C
Number of sunny days: 37 days
Number of rainy days: 328 days
Look at detailed online map of Nelliyadda
* Weather data for Nelliyadda 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) | 29.3 | 30.6 | 33.3 | 35.6 | 35.9 | 37.3 | 38.6 | 39.3 | 35.6 | 32.4 | 32.0 | 31.6 |
| Average daytime temperature (°C) | 27.8 | 28.4 | 30.3 | 32.6 | 33.1 | 35.8 | 35.8 | 37.3 | 33.2 | 30.9 | 29.9 | 28.7 |
| Average temperature (°C) | 23.6 | 24.3 | 25.8 | 27.3 | 27.8 | 29.7 | 29.8 | 29.9 | 27.3 | 25.9 | 25.3 | 25.1 |
| Average night temperature (°C) | 20.5 | 21.1 | 22.4 | 23.4 | 24.0 | 25.3 | 25.5 | 25.1 | 24.0 | 23.1 | 22.9 | 22.9 |
| Absolute minimum temperature (°C) | 18.1 | 18.4 | 21.8 | 21.8 | 23.1 | 24.0 | 23.8 | 23.9 | 22.7 | 22.1 | 22.3 | 21.8 |
| 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.5 | 12.5 | 12.4 | 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) | 8.8 | 9.1 | 9.5 | 10.3 | 9.4 | 10.5 | 9.7 | 11.0 | 9.1 | 8.5 | 7.1 | 6.9 |
| Precipitation (mm) | 189 | 139 | 112 | 88 | 127 | 80 | 51 | 65 | 311 | 390 | 478 | 499 |
| Sunny days | 5 | 4 | 5 | 5 | 6 | 3 | 4 | 4 | 1 | 0 | 0 | 0 |
| Rainy days | 26 | 24 | 26 | 25 | 25 | 27 | 27 | 27 | 29 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Nelliyadda is at