Average annual temperature is 27.1 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 18.8 °C
Number of sunny days: 83 days
Number of rainy days: 282 days
Look at detailed online map of Mahamalmaduwa
* Weather data for Mahamalmaduwa 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) | 30.0 | 32.7 | 35.5 | 36.8 | 35.6 | 36.0 | 37.4 | 37.7 | 34.7 | 33.9 | 32.2 | 31.1 |
| Average daytime temperature (°C) | 28.7 | 30.2 | 32.8 | 34.7 | 32.6 | 33.8 | 33.8 | 35.5 | 32.8 | 31.6 | 30.1 | 29.4 |
| Average temperature (°C) | 24.2 | 25.1 | 27.0 | 28.0 | 28.2 | 29.3 | 29.0 | 29.3 | 28.0 | 26.3 | 25.4 | 25.6 |
| Average night temperature (°C) | 21.0 | 21.3 | 23.1 | 24.0 | 25.3 | 26.3 | 26.0 | 25.5 | 25.0 | 23.6 | 22.8 | 23.2 |
| Absolute minimum temperature (°C) | 18.8 | 19.2 | 22.0 | 22.7 | 23.3 | 25.3 | 25.1 | 24.6 | 23.9 | 22.7 | 22.1 | 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) | 11.7 | 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) | 9.1 | 10.0 | 10.8 | 10.4 | 8.8 | 10.5 | 9.8 | 10.9 | 10.0 | 8.9 | 7.2 | 7.6 |
| Precipitation (mm) | 81 | 145 | 76 | 145 | 116 | 21 | 21 | 41 | 55 | 293 | 509 | 295 |
| Sunny days | 17 | 12 | 6 | 6 | 5 | 7 | 10 | 16 | 3 | 0 | 0 | 1 |
| Rainy days | 14 | 16 | 25 | 24 | 26 | 23 | 21 | 15 | 27 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mahamalmaduwa is at