Average annual temperature is 12.7 °C
Absolute maximum temperature: 25.6 °C
Absolute minimum temperature: -3.5 °C
Number of sunny days: 46 days
Number of rainy days: 319 days
Look at detailed online map of Siyuan
* Weather data for Siyuan Taiwan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 18.1 | 20.2 | 22.3 | 21.4 | 23.0 | 23.8 | 25.6 | 23.6 | 21.8 | 20.9 | 20.7 | 19.1 |
| Average daytime temperature (°C) | 11.3 | 13.4 | 14.5 | 17.7 | 19.3 | 21.3 | 22.0 | 21.6 | 20.6 | 17.6 | 15.2 | 13.3 |
| Average temperature (°C) | 6.8 | 8.1 | 9.3 | 13.1 | 15.2 | 16.7 | 17.0 | 16.8 | 16.0 | 13.9 | 10.6 | 8.7 |
| Average night temperature (°C) | 2.9 | 3.9 | 4.5 | 8.7 | 11.5 | 12.6 | 12.2 | 12.8 | 11.7 | 11.2 | 6.8 | 5.2 |
| Absolute minimum temperature (°C) | -3.5 | -1.0 | -3.1 | 3.2 | 8.0 | 10.1 | 9.6 | 10.1 | 9.1 | 8.2 | -0.9 | -0.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.8 | 11.3 | 12.0 | 12.7 | 13.3 | 13.6 | 13.5 | 13.0 | 12.3 | 11.6 | 11.0 | 10.7 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.1 | 8.5 | 9.1 | 10.2 | 9.3 | 8.9 | 10.1 | 9.6 | 9.3 | 7.0 | 8.9 | 6.9 |
| Precipitation (mm) | 38 | 33 | 97 | 147 | 245 | 368 | 353 | 204 | 584 | 391 | 69 | 100 |
| Sunny days | 9 | 11 | 7 | 1 | 3 | 1 | 2 | 1 | 0 | 1 | 6 | 4 |
| Rainy days | 22 | 17 | 24 | 29 | 28 | 29 | 29 | 30 | 30 | 30 | 24 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siyuan is at