Average annual temperature is 26.6 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 71 days
Number of rainy days: 294 days
Look at detailed online map of Tammannagala
* Weather data for Tammannagala 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) | 29.7 | 31.5 | 34.3 | 35.6 | 34.3 | 33.8 | 35.7 | 36.9 | 33.8 | 33.4 | 31.8 | 31.1 |
| Average daytime temperature (°C) | 28.4 | 29.6 | 31.8 | 33.6 | 31.8 | 32.5 | 32.5 | 34.6 | 31.6 | 31.4 | 30.1 | 28.9 |
| Average temperature (°C) | 24.0 | 24.9 | 26.6 | 27.6 | 27.5 | 28.0 | 27.9 | 28.6 | 26.9 | 26.0 | 25.3 | 25.3 |
| Average night temperature (°C) | 20.8 | 21.3 | 23.0 | 23.7 | 24.7 | 25.0 | 24.9 | 24.8 | 24.0 | 23.1 | 22.7 | 22.9 |
| Absolute minimum temperature (°C) | 19.0 | 19.2 | 21.8 | 22.7 | 23.4 | 23.8 | 23.5 | 24.0 | 23.1 | 22.0 | 21.9 | 22.3 |
| 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 | 10.1 | 8.9 | 10.4 | 9.4 | 10.9 | 9.1 | 8.5 | 7.0 | 7.4 |
| Precipitation (mm) | 76 | 104 | 77 | 142 | 124 | 25 | 32 | 67 | 67 | 302 | 503 | 254 |
| Sunny days | 14 | 15 | 5 | 6 | 2 | 3 | 7 | 17 | 1 | 0 | 0 | 1 |
| Rainy days | 17 | 13 | 26 | 24 | 29 | 27 | 24 | 14 | 29 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Tammannagala is at