Average annual temperature is 26.8 °C
Absolute maximum temperature: 39.8 °C
Absolute minimum temperature: 20.0 °C
Number of sunny days: 44 days
Number of rainy days: 321 days
Look at detailed online map of Horombuwatalawa
* Weather data for Horombuwatalawa 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) | 30.3 | 31.3 | 33.7 | 35.8 | 36.7 | 38.5 | 39.1 | 39.8 | 34.7 | 31.9 | 30.6 | 30.3 |
| Average daytime temperature (°C) | 28.7 | 29.1 | 30.5 | 32.6 | 32.7 | 36.8 | 35.8 | 37.7 | 32.7 | 30.2 | 29.4 | 28.7 |
| Average temperature (°C) | 24.5 | 24.9 | 25.8 | 26.9 | 27.5 | 29.7 | 29.1 | 30.0 | 27.2 | 25.4 | 25.0 | 25.0 |
| Average night temperature (°C) | 21.5 | 21.7 | 22.4 | 23.0 | 23.9 | 24.9 | 24.4 | 24.7 | 23.9 | 22.5 | 22.5 | 22.8 |
| Absolute minimum temperature (°C) | 20.0 | 20.2 | 21.3 | 21.7 | 22.7 | 23.2 | 22.9 | 23.3 | 22.8 | 21.6 | 21.9 | 21.7 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 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) | 9.2 | 9.6 | 9.5 | 9.8 | 9.4 | 10.7 | 9.8 | 11.0 | 9.5 | 8.4 | 7.3 | 7.5 |
| Precipitation (mm) | 74 | 120 | 123 | 146 | 152 | 40 | 67 | 32 | 88 | 365 | 500 | 344 |
| Sunny days | 10 | 9 | 3 | 0 | 7 | 1 | 3 | 9 | 1 | 0 | 0 | 1 |
| Rainy days | 21 | 19 | 28 | 30 | 24 | 29 | 28 | 22 | 29 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Horombuwatalawa is at