Average annual temperature is 25.4 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 10.2 °C
Number of sunny days: 125 days
Number of rainy days: 240 days
Look at detailed online map of Si Than
* Weather data for Si Than 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) | 30.1 | 32.7 | 35.9 | 38.6 | 38.9 | 34.7 | 32.8 | 33.4 | 31.7 | 30.2 | 30.2 | 30.9 |
| Average daytime temperature (°C) | 24.9 | 28.1 | 31.2 | 35.1 | 33.1 | 31.7 | 31.0 | 29.9 | 29.1 | 28.4 | 27.3 | 26.5 |
| Average temperature (°C) | 20.6 | 23.4 | 26.1 | 29.3 | 28.3 | 27.3 | 26.8 | 26.3 | 25.4 | 25.0 | 23.7 | 22.9 |
| Average night temperature (°C) | 15.3 | 18.3 | 20.9 | 24.3 | 24.4 | 24.1 | 23.7 | 23.5 | 22.9 | 22.1 | 19.9 | 18.4 |
| Absolute minimum temperature (°C) | 10.3 | 13.0 | 16.2 | 22.2 | 22.5 | 23.2 | 22.5 | 22.3 | 21.8 | 20.2 | 15.7 | 10.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.4 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.7 | 9.8 | 10.7 | 10.9 | 10.2 | 8.7 | 9.2 | 6.8 | 6.9 | 9.2 | 10.1 | 10.0 |
| Precipitation (mm) | 3 | 22 | 17 | 34 | 141 | 163 | 165 | 163 | 418 | 226 | 25 | 9 |
| Sunny days | 28 | 16 | 24 | 13 | 2 | 0 | 1 | 0 | 0 | 4 | 17 | 20 |
| Rainy days | 3 | 12 | 7 | 17 | 29 | 30 | 30 | 31 | 30 | 27 | 13 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Si Than is at