Average annual temperature is 27.7 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: 22.1 °C
Number of sunny days: 89 days
Number of rainy days: 276 days
Look at detailed online map of Thanniyatu West
* Weather data for Thanniyatu West 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) | 27.9 | 28.8 | 32.0 | 35.3 | 36.3 | 37.6 | 37.5 | 37.2 | 35.8 | 34.5 | 29.7 | 32.3 |
| Average daytime temperature (°C) | 26.7 | 27.4 | 29.5 | 31.6 | 33.3 | 35.2 | 35.1 | 35.5 | 34.0 | 31.2 | 28.4 | 28.0 |
| Average temperature (°C) | 25.3 | 25.6 | 27.0 | 28.3 | 28.7 | 30.3 | 29.9 | 29.4 | 28.8 | 27.0 | 26.1 | 26.1 |
| Average night temperature (°C) | 23.9 | 23.9 | 24.7 | 25.4 | 25.8 | 26.9 | 26.6 | 25.8 | 25.8 | 24.4 | 24.1 | 24.5 |
| Absolute minimum temperature (°C) | 23.1 | 22.1 | 23.4 | 23.9 | 23.6 | 25.8 | 25.7 | 24.8 | 24.4 | 23.5 | 23.3 | 23.5 |
| 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 | 12.7 | 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) | 9.4 | 10.3 | 11.1 | 10.7 | 9.4 | 10.5 | 9.6 | 11.1 | 10.4 | 10.2 | 7.9 | 8.0 |
| Precipitation (mm) | 119 | 153 | 41 | 66 | 76 | 24 | 24 | 71 | 67 | 236 | 516 | 350 |
| Sunny days | 12 | 10 | 8 | 11 | 8 | 12 | 13 | 8 | 5 | 2 | 0 | 0 |
| Rainy days | 19 | 18 | 23 | 19 | 23 | 18 | 18 | 23 | 25 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thanniyatu West is at