Average annual temperature is 26.3 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 40 days
Number of rainy days: 325 days
Look at detailed online map of Siyambalewa
* Weather data for Siyambalewa 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) | 30.8 | 32.5 | 34.8 | 36.5 | 33.1 | 32.2 | 31.9 | 33.7 | 31.5 | 32.9 | 32.2 | 31.4 |
| Average daytime temperature (°C) | 29.4 | 30.7 | 32.8 | 33.4 | 31.1 | 30.5 | 30.0 | 32.1 | 29.5 | 30.0 | 30.4 | 29.9 |
| Average temperature (°C) | 24.6 | 25.7 | 27.1 | 27.4 | 27.2 | 27.0 | 26.9 | 27.6 | 25.7 | 25.6 | 25.5 | 25.8 |
| Average night temperature (°C) | 20.9 | 21.7 | 23.2 | 23.7 | 24.5 | 24.3 | 24.3 | 24.5 | 23.3 | 23.0 | 22.9 | 23.2 |
| Absolute minimum temperature (°C) | 18.7 | 19.7 | 22.3 | 22.4 | 22.8 | 22.6 | 22.4 | 23.1 | 22.3 | 22.0 | 22.3 | 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 | 12.5 | 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) | 9.5 | 9.9 | 10.7 | 10.1 | 9.2 | 10.0 | 9.7 | 11.0 | 8.0 | 8.1 | 7.5 | 7.9 |
| Precipitation (mm) | 66 | 68 | 88 | 192 | 191 | 127 | 101 | 39 | 282 | 385 | 599 | 279 |
| Sunny days | 17 | 14 | 2 | 1 | 0 | 0 | 1 | 3 | 0 | 0 | 0 | 2 |
| Rainy days | 14 | 14 | 29 | 29 | 31 | 30 | 30 | 28 | 30 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siyambalewa is at