Average annual temperature is 22.4 °C
Absolute maximum temperature: 30.9 °C
Absolute minimum temperature: 18.1 °C
Number of sunny days: 18 days
Number of rainy days: 347 days
Look at detailed online map of Siagian
* Weather data for Siagian Indonesia is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.1 | 29.0 | 29.8 | 29.1 | 30.9 | 30.3 | 27.8 | 28.4 | 29.3 | 28.4 | 27.4 | 28.9 |
| Average daytime temperature (°C) | 26.3 | 26.7 | 27.3 | 26.5 | 27.1 | 27.1 | 25.7 | 26.1 | 25.9 | 26.1 | 26.1 | 26.4 |
| Average temperature (°C) | 22.0 | 22.4 | 22.4 | 22.5 | 23.1 | 23.1 | 22.3 | 22.2 | 22.1 | 22.0 | 22.2 | 22.3 |
| Average night temperature (°C) | 19.4 | 19.5 | 19.5 | 20.1 | 20.6 | 20.4 | 19.9 | 19.8 | 19.8 | 19.7 | 19.9 | 20.2 |
| Absolute minimum temperature (°C) | 18.1 | 18.8 | 18.2 | 19.1 | 19.9 | 19.3 | 19.1 | 18.9 | 18.6 | 18.6 | 19.2 | 19.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.0 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 8.1 | 9.3 | 8.4 | 7.7 | 8.6 | 9.1 | 8.4 | 7.6 | 7.8 | 7.7 | 7.3 | 6.7 |
| Precipitation (mm) | 294 | 224 | 349 | 338 | 231 | 207 | 178 | 365 | 313 | 393 | 378 | 724 |
| Sunny days | 2 | 4 | 0 | 0 | 1 | 4 | 4 | 2 | 0 | 1 | 0 | 0 |
| Rainy days | 29 | 24 | 31 | 30 | 30 | 26 | 27 | 29 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siagian is at