Average annual temperature is 23.9 °C
Absolute maximum temperature: 31.5 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 8 days
Number of rainy days: 357 days
Look at detailed online map of Kota Pematang Siantar
* Weather data for Kota Pematang Siantar 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) | 28.5 | 28.7 | 30.0 | 29.7 | 31.5 | 31.5 | 30.4 | 29.8 | 30.7 | 30.9 | 29.2 | 29.2 |
| Average daytime temperature (°C) | 27.1 | 27.4 | 28.0 | 28.4 | 29.0 | 28.7 | 28.5 | 28.2 | 28.4 | 28.2 | 27.6 | 27.4 |
| Average temperature (°C) | 23.1 | 23.3 | 23.6 | 24.3 | 24.7 | 24.5 | 24.3 | 23.9 | 24.2 | 23.9 | 23.7 | 23.8 |
| Average night temperature (°C) | 20.4 | 20.4 | 20.5 | 21.2 | 21.6 | 21.3 | 21.2 | 21.1 | 21.4 | 21.1 | 21.2 | 21.3 |
| Absolute minimum temperature (°C) | 19.0 | 19.4 | 19.3 | 19.3 | 20.4 | 19.7 | 19.7 | 20.3 | 20.3 | 19.8 | 20.5 | 20.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 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 | 12.3 | 12.3 | 12.3 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 8.2 | 8.9 | 8.4 | 8.2 | 8.3 | 8.9 | 8.5 | 7.5 | 7.4 | 6.9 | 6.3 | 7.8 |
| Precipitation (mm) | 231 | 255 | 249 | 207 | 305 | 248 | 213 | 438 | 378 | 457 | 409 | 356 |
| Sunny days | 0 | 0 | 1 | 0 | 1 | 5 | 1 | 0 | 0 | 0 | 0 | 0 |
| Rainy days | 31 | 28 | 30 | 30 | 30 | 25 | 30 | 31 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kota Pematang Siantar is at