Average annual temperature is 27.6 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 19.9 °C
Number of sunny days: 67 days
Number of rainy days: 298 days
Look at detailed online map of Vanniyamadu
* Weather data for Vanniyamadu 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) | 29.2 | 30.4 | 34.1 | 37.0 | 37.2 | 37.1 | 38.3 | 39.0 | 36.9 | 33.9 | 31.4 | 31.8 |
| Average daytime temperature (°C) | 27.8 | 28.7 | 31.1 | 34.0 | 34.0 | 35.9 | 35.7 | 37.3 | 34.0 | 31.7 | 29.5 | 28.8 |
| Average temperature (°C) | 24.7 | 25.2 | 26.8 | 28.5 | 28.8 | 30.4 | 30.0 | 30.1 | 28.4 | 26.7 | 25.8 | 25.8 |
| Average night temperature (°C) | 22.0 | 22.2 | 23.6 | 24.6 | 25.6 | 26.6 | 26.4 | 25.8 | 25.3 | 23.9 | 23.5 | 23.8 |
| Absolute minimum temperature (°C) | 19.9 | 19.9 | 22.7 | 23.0 | 23.8 | 25.6 | 25.4 | 24.9 | 24.0 | 23.1 | 22.7 | 23.1 |
| 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) | 8.9 | 9.9 | 10.7 | 10.5 | 9.0 | 10.7 | 9.5 | 10.8 | 9.7 | 9.5 | 7.7 | 7.9 |
| Precipitation (mm) | 146 | 100 | 90 | 73 | 158 | 15 | 35 | 108 | 189 | 399 | 513 | 382 |
| Sunny days | 12 | 13 | 7 | 8 | 7 | 4 | 5 | 8 | 1 | 2 | 0 | 0 |
| Rainy days | 19 | 15 | 24 | 22 | 24 | 26 | 26 | 23 | 29 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Vanniyamadu is at