Average annual temperature is 22.6 °C
Absolute maximum temperature: 28.8 °C
Absolute minimum temperature: 17.2 °C
Number of sunny days: 13 days
Number of rainy days: 352 days
Look at detailed online map of Lumban Siahaan
* Weather data for Lumban Siahaan 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) | 26.2 | 27.5 | 27.4 | 27.7 | 28.7 | 28.8 | 28.4 | 27.6 | 27.6 | 27.7 | 27.3 | 27.7 |
| Average daytime temperature (°C) | 24.9 | 25.4 | 25.7 | 25.9 | 26.6 | 26.7 | 26.3 | 25.7 | 25.8 | 25.7 | 25.5 | 25.6 |
| Average temperature (°C) | 21.9 | 22.2 | 22.5 | 23.0 | 23.3 | 23.3 | 22.7 | 22.6 | 22.6 | 22.6 | 22.5 | 22.6 |
| Average night temperature (°C) | 19.1 | 19.3 | 19.7 | 20.3 | 20.2 | 20.1 | 19.6 | 19.7 | 19.7 | 19.6 | 19.8 | 19.9 |
| Absolute minimum temperature (°C) | 17.2 | 17.9 | 18.0 | 18.1 | 18.2 | 18.9 | 18.0 | 18.3 | 18.7 | 18.5 | 18.9 | 19.0 |
| 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 | 11.0 |
| Daylight mean duration (h) | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 |
| Daylight minimum duration (h) | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 8.6 | 9.3 | 8.9 | 8.8 | 8.8 | 9.2 | 8.7 | 8.2 | 8.0 | 8.0 | 7.1 | 8.6 |
| Precipitation (mm) | 192 | 219 | 194 | 247 | 154 | 113 | 139 | 249 | 202 | 196 | 399 | 446 |
| Sunny days | 1 | 0 | 0 | 0 | 2 | 3 | 6 | 0 | 0 | 1 | 0 | 0 |
| Rainy days | 30 | 28 | 31 | 30 | 29 | 27 | 25 | 31 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Lumban Siahaan is at