Average annual temperature is 27.3 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: 20.6 °C
Number of sunny days: 43 days
Number of rainy days: 322 days
Look at detailed online map of Kalapu
* Weather data for Kalapu 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) | 29.0 | 30.1 | 32.0 | 33.3 | 34.5 | 36.6 | 38.2 | 37.3 | 36.2 | 32.8 | 30.8 | 31.1 |
| Average daytime temperature (°C) | 27.9 | 28.1 | 29.6 | 31.1 | 32.5 | 34.7 | 34.6 | 35.3 | 33.8 | 30.5 | 29.1 | 28.5 |
| Average temperature (°C) | 24.9 | 25.3 | 26.3 | 27.4 | 28.2 | 29.5 | 29.5 | 29.9 | 28.4 | 26.3 | 25.7 | 25.7 |
| Average night temperature (°C) | 22.3 | 22.8 | 23.2 | 24.3 | 25.1 | 26.0 | 25.7 | 25.8 | 25.3 | 23.7 | 23.4 | 23.7 |
| Absolute minimum temperature (°C) | 20.6 | 21.5 | 22.2 | 23.3 | 23.3 | 24.4 | 24.5 | 24.8 | 23.7 | 23.0 | 22.6 | 22.6 |
| 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) | 9.1 | 9.4 | 9.9 | 10.4 | 9.7 | 10.8 | 9.6 | 11.0 | 9.7 | 8.7 | 8.4 | 7.9 |
| Precipitation (mm) | 175 | 194 | 139 | 91 | 95 | 87 | 57 | 51 | 84 | 300 | 432 | 468 |
| Sunny days | 8 | 5 | 3 | 1 | 7 | 3 | 7 | 6 | 1 | 1 | 0 | 1 |
| Rainy days | 23 | 23 | 28 | 29 | 24 | 27 | 24 | 25 | 29 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kalapu is at