Average annual temperature is 26.5 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: 17.7 °C
Number of sunny days: 79 days
Number of rainy days: 286 days
Look at detailed online map of Haddattawa
* Weather data for Haddattawa 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) | 27.7 | 29.0 | 31.8 | 33.9 | 34.5 | 35.7 | 38.5 | 39.2 | 36.5 | 31.2 | 30.1 | 30.0 |
| Average daytime temperature (°C) | 26.9 | 27.7 | 29.3 | 31.6 | 32.1 | 34.6 | 34.5 | 36.7 | 32.8 | 29.7 | 28.8 | 28.0 |
| Average temperature (°C) | 23.3 | 24.1 | 25.3 | 26.7 | 27.4 | 29.4 | 29.1 | 29.8 | 27.7 | 25.7 | 25.0 | 24.8 |
| Average night temperature (°C) | 20.4 | 21.3 | 22.2 | 23.1 | 24.0 | 25.3 | 24.8 | 24.5 | 24.1 | 23.1 | 22.7 | 22.9 |
| Absolute minimum temperature (°C) | 17.7 | 18.3 | 21.1 | 21.6 | 22.9 | 24.2 | 23.1 | 23.5 | 22.7 | 21.4 | 22.0 | 21.9 |
| 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 | 12.5 | 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) | 8.2 | 8.9 | 9.3 | 10.2 | 9.5 | 10.8 | 9.4 | 10.7 | 8.4 | 8.3 | 7.4 | 6.6 |
| Precipitation (mm) | 244 | 253 | 212 | 120 | 175 | 15 | 18 | 70 | 109 | 603 | 493 | 613 |
| Sunny days | 7 | 4 | 5 | 8 | 10 | 10 | 16 | 13 | 6 | 0 | 0 | 0 |
| Rainy days | 24 | 24 | 26 | 22 | 21 | 20 | 15 | 18 | 24 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Haddattawa is at