Average annual temperature is 27.0 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 13.6 °C
Number of sunny days: 135 days
Number of rainy days: 230 days
Look at detailed online map of Siao
* Weather data for Siao Thailand 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 | 34.1 | 37.3 | 38.5 | 38.9 | 34.7 | 33.5 | 33.0 | 32.2 | 32.0 | 32.7 | 33.3 |
| Average daytime temperature (°C) | 27.2 | 31.9 | 33.5 | 36.0 | 33.7 | 32.5 | 31.5 | 31.4 | 30.1 | 30.7 | 31.0 | 30.4 |
| Average temperature (°C) | 21.9 | 26.2 | 27.8 | 30.8 | 29.3 | 28.2 | 27.6 | 27.6 | 26.4 | 26.7 | 26.2 | 25.2 |
| Average night temperature (°C) | 16.9 | 20.8 | 22.3 | 26.4 | 25.7 | 25.3 | 24.8 | 24.8 | 23.9 | 23.5 | 22.2 | 20.6 |
| Absolute minimum temperature (°C) | 13.6 | 16.4 | 18.2 | 22.8 | 23.6 | 24.0 | 23.1 | 23.3 | 23.1 | 22.0 | 18.9 | 15.1 |
| 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 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.1 | 12.5 | 12.8 | 13.0 | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 |
| 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) | 8.3 | 10.4 | 10.9 | 10.8 | 10.6 | 9.9 | 9.0 | 8.2 | 7.2 | 9.3 | 10.2 | 9.9 |
| Precipitation (mm) | 37 | 7 | 6 | 98 | 224 | 188 | 285 | 206 | 402 | 245 | 37 | 2 |
| Sunny days | 26 | 21 | 24 | 10 | 7 | 1 | 2 | 2 | 0 | 1 | 14 | 27 |
| Rainy days | 5 | 7 | 7 | 20 | 24 | 29 | 29 | 29 | 30 | 30 | 16 | 4 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siao is at