Average annual temperature is 27.3 °C
Absolute maximum temperature: 38.6 °C
Absolute minimum temperature: 19.7 °C
Number of sunny days: 50 days
Number of rainy days: 315 days
Look at detailed online map of Thiyavattavan
* Weather data for Thiyavattavan 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) | 28.7 | 29.3 | 32.2 | 34.6 | 35.8 | 37.2 | 38.6 | 38.4 | 35.3 | 32.5 | 31.3 | 30.3 |
| Average daytime temperature (°C) | 27.4 | 28.1 | 29.9 | 32.0 | 33.1 | 35.8 | 35.8 | 36.2 | 32.7 | 30.6 | 29.3 | 28.7 |
| Average temperature (°C) | 24.8 | 25.3 | 26.4 | 27.7 | 28.2 | 30.3 | 30.2 | 29.8 | 27.6 | 26.2 | 25.7 | 25.9 |
| Average night temperature (°C) | 22.0 | 22.5 | 23.4 | 24.0 | 24.6 | 26.1 | 26.3 | 25.4 | 24.3 | 23.4 | 23.2 | 23.6 |
| Absolute minimum temperature (°C) | 19.7 | 20.0 | 22.3 | 22.7 | 23.3 | 24.6 | 24.6 | 24.0 | 23.1 | 22.4 | 22.6 | 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 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.5 | 12.4 | 12.2 | 11.9 | 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) | 9.0 | 9.5 | 10.2 | 10.6 | 9.4 | 10.8 | 9.5 | 11.0 | 9.4 | 9.2 | 7.8 | 8.0 |
| Precipitation (mm) | 183 | 120 | 107 | 77 | 148 | 43 | 43 | 56 | 287 | 486 | 500 | 433 |
| Sunny days | 4 | 6 | 7 | 7 | 5 | 5 | 8 | 5 | 1 | 2 | 0 | 0 |
| Rainy days | 27 | 22 | 24 | 23 | 26 | 25 | 23 | 26 | 29 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thiyavattavan is at