Average annual temperature is 26.9 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 30 days
Number of rainy days: 335 days
Look at detailed online map of Thanthamalai
* Weather data for Thanthamalai 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) | 29.0 | 29.5 | 33.3 | 35.2 | 35.8 | 37.3 | 39.3 | 38.5 | 35.5 | 32.7 | 32.1 | 31.5 |
| Average daytime temperature (°C) | 27.7 | 28.3 | 30.2 | 32.3 | 33.2 | 35.7 | 36.5 | 36.8 | 33.4 | 31.0 | 29.6 | 28.8 |
| Average temperature (°C) | 24.1 | 24.7 | 26.1 | 27.4 | 28.0 | 29.2 | 29.8 | 29.7 | 27.4 | 25.9 | 25.4 | 25.3 |
| Average night temperature (°C) | 21.2 | 21.7 | 22.8 | 23.6 | 24.3 | 24.9 | 25.0 | 24.8 | 23.9 | 23.1 | 22.9 | 22.9 |
| Absolute minimum temperature (°C) | 19.0 | 19.6 | 21.9 | 22.5 | 23.3 | 23.6 | 23.9 | 23.3 | 22.6 | 22.4 | 22.3 | 22.1 |
| 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 | 12.5 | 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) | 9.1 | 9.2 | 9.8 | 10.5 | 9.5 | 10.6 | 9.9 | 11.1 | 9.4 | 9.0 | 7.6 | 7.7 |
| Precipitation (mm) | 218 | 155 | 133 | 96 | 188 | 83 | 69 | 86 | 423 | 564 | 627 | 519 |
| Sunny days | 4 | 4 | 4 | 4 | 5 | 0 | 4 | 4 | 0 | 1 | 0 | 0 |
| Rainy days | 27 | 24 | 27 | 26 | 26 | 30 | 27 | 27 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thanthamalai is at