Average annual temperature is 26.5 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 66 days
Number of rainy days: 299 days
Look at detailed online map of Demategama
* Weather data for Demategama 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) | 29.4 | 31.2 | 34.0 | 35.7 | 34.5 | 34.3 | 35.7 | 36.7 | 34.5 | 33.4 | 31.5 | 31.5 |
| Average daytime temperature (°C) | 28.2 | 29.3 | 31.5 | 33.6 | 31.9 | 32.7 | 32.7 | 34.8 | 32.1 | 31.2 | 29.8 | 28.8 |
| Average temperature (°C) | 23.8 | 24.7 | 26.4 | 27.6 | 27.4 | 28.1 | 27.9 | 28.6 | 27.0 | 25.8 | 25.1 | 25.1 |
| Average night temperature (°C) | 20.6 | 21.1 | 22.8 | 23.6 | 24.5 | 24.9 | 24.8 | 24.6 | 23.9 | 22.9 | 22.5 | 22.7 |
| Absolute minimum temperature (°C) | 18.7 | 19.1 | 21.6 | 22.4 | 23.2 | 23.6 | 23.3 | 23.8 | 23.1 | 21.6 | 21.7 | 21.9 |
| 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 | 11.9 | 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 | 9.8 | 10.6 | 10.3 | 8.9 | 10.6 | 9.5 | 10.9 | 9.1 | 8.6 | 7.2 | 7.4 |
| Precipitation (mm) | 93 | 91 | 70 | 142 | 106 | 24 | 34 | 69 | 71 | 307 | 494 | 250 |
| Sunny days | 14 | 14 | 6 | 6 | 2 | 4 | 7 | 12 | 0 | 0 | 0 | 1 |
| Rainy days | 17 | 14 | 25 | 24 | 29 | 26 | 24 | 19 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Demategama is at