Average annual temperature is 27.4 °C
Absolute maximum temperature: 39.5 °C
Absolute minimum temperature: 19.5 °C
Number of sunny days: 90 days
Number of rainy days: 275 days
Look at detailed online map of Thanduvan
* Weather data for Thanduvan 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) | 28.9 | 30.9 | 35.3 | 37.8 | 37.4 | 38.5 | 38.5 | 39.5 | 36.4 | 35.1 | 31.3 | 32.1 |
| Average daytime temperature (°C) | 27.6 | 28.9 | 31.8 | 34.6 | 33.6 | 35.3 | 35.4 | 36.8 | 34.4 | 32.5 | 29.4 | 28.6 |
| Average temperature (°C) | 24.3 | 24.9 | 26.7 | 28.2 | 28.5 | 30.1 | 29.8 | 29.7 | 28.7 | 26.8 | 25.5 | 25.5 |
| Average night temperature (°C) | 21.7 | 21.8 | 23.2 | 24.0 | 25.1 | 26.5 | 26.2 | 25.4 | 25.3 | 23.6 | 23.0 | 23.4 |
| Absolute minimum temperature (°C) | 19.7 | 19.5 | 22.2 | 22.2 | 23.0 | 25.3 | 25.1 | 24.5 | 24.1 | 22.8 | 22.3 | 22.8 |
| 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 | 11.8 | 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) | 9.3 | 10.1 | 11.0 | 10.5 | 8.8 | 10.5 | 9.5 | 10.8 | 10.1 | 9.5 | 7.3 | 7.1 |
| Precipitation (mm) | 104 | 109 | 60 | 81 | 106 | 29 | 28 | 90 | 78 | 290 | 485 | 312 |
| Sunny days | 14 | 16 | 9 | 10 | 7 | 9 | 12 | 9 | 0 | 3 | 0 | 1 |
| Rainy days | 17 | 12 | 22 | 20 | 24 | 21 | 19 | 22 | 30 | 28 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thanduvan is at