Average annual temperature is 26.8 °C
Absolute maximum temperature: 37.8 °C
Absolute minimum temperature: 17.8 °C
Number of sunny days: 79 days
Number of rainy days: 286 days
Look at detailed online map of Sandamalgama
* Weather data for Sandamalgama 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) | 29.1 | 31.1 | 34.3 | 35.7 | 34.3 | 34.2 | 37.0 | 37.8 | 35.5 | 33.9 | 31.8 | 31.4 |
| Average daytime temperature (°C) | 28.1 | 29.6 | 31.7 | 33.6 | 31.9 | 32.9 | 33.3 | 35.6 | 32.9 | 31.5 | 29.9 | 28.9 |
| Average temperature (°C) | 23.8 | 24.8 | 26.6 | 27.7 | 27.7 | 28.5 | 28.5 | 29.0 | 27.5 | 26.2 | 25.4 | 25.3 |
| Average night temperature (°C) | 20.5 | 21.1 | 22.9 | 23.9 | 24.9 | 25.4 | 25.3 | 25.0 | 24.3 | 23.3 | 22.8 | 22.9 |
| Absolute minimum temperature (°C) | 17.8 | 19.0 | 21.4 | 22.6 | 23.5 | 24.2 | 24.4 | 24.3 | 23.5 | 22.4 | 22.1 | 22.1 |
| 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 | 12.6 | 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 | 9.8 | 10.7 | 10.3 | 8.7 | 10.6 | 9.4 | 10.9 | 9.6 | 8.7 | 7.2 | 7.6 |
| Precipitation (mm) | 80 | 112 | 67 | 136 | 105 | 17 | 28 | 84 | 76 | 323 | 501 | 277 |
| Sunny days | 14 | 15 | 5 | 9 | 4 | 9 | 8 | 14 | 0 | 0 | 0 | 1 |
| Rainy days | 17 | 13 | 26 | 21 | 27 | 21 | 23 | 17 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sandamalgama is at