Average annual temperature is 27.4 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: 21.0 °C
Number of sunny days: 87 days
Number of rainy days: 278 days
Look at detailed online map of Ilocanos Sur
* Weather data for Ilocanos Sur Philippines is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.1 | 31.2 | 33.5 | 34.6 | 34.9 | 31.9 | 32.4 | 31.3 | 31.3 | 31.3 | 31.4 | 31.7 |
| Average daytime temperature (°C) | 29.0 | 29.8 | 30.7 | 32.1 | 32.0 | 30.7 | 30.2 | 29.6 | 29.8 | 30.2 | 30.7 | 30.7 |
| Average temperature (°C) | 26.1 | 26.6 | 27.3 | 28.6 | 28.7 | 27.7 | 27.5 | 26.9 | 27.0 | 27.3 | 27.6 | 27.6 |
| Average night temperature (°C) | 23.2 | 23.1 | 23.8 | 25.3 | 26.0 | 25.6 | 25.3 | 24.9 | 24.8 | 24.5 | 24.3 | 24.5 |
| Absolute minimum temperature (°C) | 21.2 | 21.5 | 21.0 | 23.9 | 24.5 | 24.7 | 24.0 | 23.5 | 23.7 | 23.1 | 22.0 | 23.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.4 | 11.2 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.5 | 10.4 | 11.2 | 11.6 | 11.2 | 9.0 | 7.7 | 8.8 | 8.1 | 8.8 | 10.3 | 9.8 |
| Precipitation (mm) | 38 | 16 | 4 | 41 | 234 | 348 | 673 | 535 | 444 | 147 | 21 | 25 |
| Sunny days | 18 | 17 | 20 | 7 | 2 | 1 | 0 | 0 | 0 | 1 | 10 | 11 |
| Rainy days | 13 | 11 | 11 | 23 | 29 | 29 | 31 | 31 | 30 | 30 | 20 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ilocanos Sur is at