Average annual temperature is 27.2 °C
Absolute maximum temperature: 38.5 °C
Absolute minimum temperature: 18.3 °C
Number of sunny days: 87 days
Number of rainy days: 278 days
Look at detailed online map of Thaddankulam
* Weather data for Thaddankulam 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) | 29.5 | 32.2 | 35.8 | 37.3 | 36.1 | 37.0 | 38.0 | 38.5 | 35.3 | 34.5 | 32.2 | 31.0 |
| Average daytime temperature (°C) | 28.3 | 29.8 | 32.6 | 34.8 | 32.9 | 34.4 | 34.8 | 36.4 | 33.4 | 32.0 | 29.9 | 29.0 |
| Average temperature (°C) | 24.1 | 24.9 | 27.0 | 28.2 | 28.2 | 29.5 | 29.4 | 29.6 | 28.2 | 26.5 | 25.5 | 25.5 |
| Average night temperature (°C) | 20.9 | 21.0 | 23.0 | 23.8 | 25.1 | 26.2 | 25.9 | 25.4 | 24.9 | 23.4 | 22.8 | 23.1 |
| Absolute minimum temperature (°C) | 18.3 | 19.1 | 22.2 | 22.2 | 23.0 | 25.1 | 25.0 | 24.7 | 24.1 | 22.5 | 22.1 | 22.5 |
| 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 | 12.6 | 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) | 9.2 | 9.9 | 10.9 | 10.3 | 8.8 | 10.6 | 9.8 | 10.8 | 10.0 | 8.9 | 7.2 | 7.8 |
| Precipitation (mm) | 78 | 112 | 56 | 164 | 98 | 23 | 22 | 46 | 80 | 297 | 495 | 239 |
| Sunny days | 16 | 14 | 8 | 7 | 7 | 7 | 9 | 16 | 1 | 0 | 1 | 1 |
| Rainy days | 15 | 14 | 23 | 23 | 24 | 23 | 22 | 15 | 29 | 31 | 29 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thaddankulam is at