Average annual temperature is 27.0 °C
Absolute maximum temperature: 33.3 °C
Absolute minimum temperature: 21.9 °C
Number of sunny days: 12 days
Number of rainy days: 353 days
Look at detailed online map of Siai
* Weather data for Siai Philippines is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 28.1 | 28.9 | 29.3 | 30.3 | 32.5 | 32.8 | 32.4 | 33.3 | 32.0 | 31.9 | 30.2 | 29.7 |
| Average daytime temperature (°C) | 26.2 | 27.3 | 27.6 | 29.1 | 30.3 | 30.4 | 30.1 | 31.6 | 30.8 | 29.8 | 28.5 | 28.5 |
| Average temperature (°C) | 24.9 | 25.4 | 25.6 | 27.0 | 28.1 | 28.0 | 27.7 | 28.6 | 27.8 | 27.3 | 26.6 | 26.4 |
| Average night temperature (°C) | 23.9 | 24.1 | 24.0 | 25.1 | 26.1 | 26.0 | 25.8 | 26.2 | 25.6 | 25.5 | 25.0 | 24.7 |
| Absolute minimum temperature (°C) | 21.9 | 22.0 | 22.8 | 23.9 | 24.9 | 24.6 | 24.7 | 24.8 | 24.2 | 24.3 | 24.1 | 23.3 |
| 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) | 11.4 | 11.7 | 12.1 | 12.4 | 12.8 | 12.9 | 12.8 | 12.6 | 12.2 | 11.8 | 11.5 | 11.3 |
| 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) | 4.5 | 8.8 | 10.9 | 11.0 | 10.8 | 11.3 | 9.7 | 10.4 | 9.9 | 9.0 | 7.7 | 9.9 |
| Precipitation (mm) | 822 | 377 | 102 | 166 | 148 | 124 | 211 | 88 | 209 | 154 | 410 | 227 |
| Sunny days | 0 | 0 | 3 | 0 | 0 | 2 | 1 | 5 | 0 | 1 | 0 | 0 |
| Rainy days | 31 | 28 | 28 | 30 | 31 | 28 | 30 | 26 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siai is at