Average annual temperature is 13.3 °C
Absolute maximum temperature: 25.7 °C
Absolute minimum temperature: -4.1 °C
Number of sunny days: 45 days
Number of rainy days: 320 days
Look at detailed online map of Siyuanyakou
* Weather data for Siyuanyakou 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) | 18.6 | 20.3 | 22.1 | 21.4 | 23.4 | 23.8 | 25.7 | 24.3 | 22.9 | 20.9 | 21.2 | 19.5 |
| Average daytime temperature (°C) | 12.1 | 14.0 | 15.0 | 18.2 | 19.8 | 21.6 | 22.5 | 22.1 | 21.2 | 18.3 | 15.9 | 13.9 |
| Average temperature (°C) | 7.3 | 8.5 | 10.0 | 13.6 | 15.7 | 17.2 | 17.6 | 17.6 | 16.7 | 14.4 | 11.2 | 9.4 |
| Average night temperature (°C) | 3.0 | 4.1 | 5.4 | 9.2 | 12.1 | 13.3 | 13.1 | 13.8 | 12.6 | 11.4 | 7.3 | 5.8 |
| Absolute minimum temperature (°C) | -4.1 | -0.9 | -2.2 | 4.8 | 8.8 | 10.4 | 10.2 | 10.9 | 9.9 | 8.1 | 3.0 | -0.4 |
| 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) | 8.2 | 8.8 | 9.4 | 10.4 | 9.5 | 8.9 | 10.1 | 9.6 | 9.3 | 7.2 | 9.1 | 7.0 |
| Precipitation (mm) | 54 | 34 | 127 | 166 | 256 | 444 | 312 | 286 | 498 | 464 | 89 | 134 |
| Sunny days | 7 | 8 | 5 | 2 | 3 | 0 | 2 | 0 | 1 | 2 | 7 | 8 |
| Rainy days | 24 | 20 | 26 | 28 | 28 | 30 | 29 | 31 | 29 | 29 | 23 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siyuanyakou is at