Average annual temperature is 21.0 °C
Absolute maximum temperature: 29.1 °C
Absolute minimum temperature: 15.0 °C
Number of sunny days: 19 days
Number of rainy days: 346 days
Look at detailed online map of Siantartua
* Weather data for Siantartua 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) | 27.5 | 27.8 | 28.0 | 28.1 | 28.7 | 29.1 | 27.8 | 28.5 | 28.3 | 28.3 | 28.1 | 28.0 |
| Average daytime temperature (°C) | 25.5 | 25.8 | 26.0 | 26.2 | 26.5 | 26.2 | 25.3 | 25.9 | 26.1 | 26.3 | 26.1 | 26.2 |
| Average temperature (°C) | 20.3 | 20.5 | 20.8 | 21.1 | 21.7 | 21.5 | 20.9 | 20.9 | 21.1 | 21.1 | 21.1 | 21.3 |
| Average night temperature (°C) | 17.0 | 17.2 | 17.4 | 17.9 | 18.9 | 18.2 | 17.9 | 17.8 | 18.3 | 18.0 | 18.3 | 18.5 |
| Absolute minimum temperature (°C) | 15.0 | 16.2 | 16.1 | 16.3 | 17.3 | 17.0 | 16.2 | 16.9 | 16.5 | 16.5 | 17.4 | 17.0 |
| 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 | 12.0 |
| Daylight mean duration (h) | 12.0 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 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) | 7.5 | 8.5 | 8.1 | 7.3 | 8.1 | 8.7 | 8.0 | 7.5 | 7.7 | 7.3 | 6.8 | 6.9 |
| Precipitation (mm) | 172 | 229 | 301 | 284 | 199 | 129 | 109 | 333 | 186 | 266 | 307 | 572 |
| Sunny days | 2 | 3 | 0 | 0 | 0 | 5 | 6 | 0 | 1 | 2 | 0 | 0 |
| Rainy days | 29 | 25 | 31 | 30 | 31 | 25 | 25 | 31 | 29 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siantartua is at