Average annual temperature is 27.3 °C
Absolute maximum temperature: 40.1 °C
Absolute minimum temperature: 16.5 °C
Number of sunny days: 66 days
Number of rainy days: 299 days
Look at detailed online map of Selasumgama
* Weather data for Selasumgama 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) | 29.6 | 30.9 | 33.6 | 36.1 | 36.2 | 36.5 | 37.8 | 40.1 | 37.3 | 34.7 | 31.5 | 31.1 |
| Average daytime temperature (°C) | 28.2 | 29.1 | 30.9 | 33.5 | 33.5 | 35.2 | 34.9 | 37.7 | 34.8 | 31.9 | 30.1 | 29.3 |
| Average temperature (°C) | 23.9 | 24.7 | 26.1 | 27.6 | 28.3 | 30.3 | 30.2 | 30.7 | 28.9 | 26.4 | 25.5 | 25.4 |
| Average night temperature (°C) | 20.1 | 21.1 | 22.6 | 23.5 | 24.7 | 27.0 | 26.8 | 25.9 | 25.0 | 23.3 | 23.0 | 22.9 |
| Absolute minimum temperature (°C) | 16.5 | 18.2 | 21.5 | 22.1 | 23.1 | 25.6 | 24.6 | 24.3 | 23.2 | 21.9 | 22.3 | 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 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) | 8.6 | 8.8 | 9.6 | 10.1 | 9.2 | 10.8 | 9.8 | 10.8 | 9.2 | 8.3 | 6.8 | 6.8 |
| Precipitation (mm) | 155 | 160 | 128 | 117 | 168 | 13 | 12 | 51 | 74 | 390 | 562 | 491 |
| Sunny days | 7 | 5 | 4 | 3 | 11 | 9 | 15 | 11 | 1 | 0 | 0 | 0 |
| Rainy days | 24 | 23 | 27 | 27 | 20 | 21 | 16 | 20 | 29 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Selasumgama is at