Average annual temperature is 23.1 °C
Absolute maximum temperature: 31.6 °C
Absolute minimum temperature: 14.1 °C
Number of sunny days: 82 days
Number of rainy days: 283 days
Look at detailed online map of Slak
* Weather data for Slak 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 | 27.5 | 28.2 | 28.3 | 28.3 | 28.4 | 27.1 | 29.3 | 30.9 | 31.5 | 31.6 | 30.5 |
| Average daytime temperature (°C) | 26.1 | 26.4 | 26.9 | 27.0 | 27.1 | 26.9 | 25.8 | 27.9 | 28.7 | 30.1 | 28.7 | 28.1 |
| Average temperature (°C) | 22.8 | 22.6 | 23.1 | 23.3 | 23.2 | 22.9 | 21.8 | 22.0 | 22.6 | 24.3 | 24.2 | 24.0 |
| Average night temperature (°C) | 20.2 | 20.0 | 19.9 | 20.3 | 19.3 | 19.7 | 18.1 | 17.5 | 18.3 | 20.1 | 21.3 | 20.8 |
| Absolute minimum temperature (°C) | 18.9 | 19.1 | 18.4 | 18.2 | 16.1 | 17.0 | 14.1 | 14.8 | 16.5 | 18.4 | 19.7 | 17.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.5 | 12.3 | 12.1 | 11.9 | 11.8 | 11.7 | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.7 | 6.1 | 8.5 | 8.6 | 9.5 | 9.6 | 9.1 | 10.5 | 10.6 | 11.1 | 9.5 | 9.0 |
| Precipitation (mm) | 184 | 291 | 279 | 201 | 149 | 94 | 96 | 3 | 8 | 37 | 191 | 264 |
| Sunny days | 0 | 0 | 0 | 0 | 14 | 5 | 14 | 24 | 15 | 3 | 1 | 6 |
| Rainy days | 31 | 28 | 31 | 30 | 17 | 25 | 17 | 7 | 15 | 28 | 29 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Slak is at