Average annual temperature is 27.1 °C
Absolute maximum temperature: 38.5 °C
Absolute minimum temperature: 16.5 °C
Number of sunny days: 119 days
Number of rainy days: 246 days
Look at detailed online map of Usulután
* Weather data for Usulután El Salvador is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 36.5 | 38.1 | 37.6 | 38.5 | 37.1 | 34.0 | 35.5 | 34.0 | 33.2 | 31.1 | 32.1 | 34.9 |
| Average daytime temperature (°C) | 32.2 | 34.9 | 33.0 | 33.6 | 32.7 | 31.1 | 32.6 | 31.3 | 31.4 | 29.3 | 30.3 | 32.1 |
| Average temperature (°C) | 26.1 | 27.7 | 27.3 | 28.0 | 28.2 | 27.1 | 27.7 | 27.2 | 27.3 | 25.8 | 26.2 | 26.4 |
| Average night temperature (°C) | 21.3 | 22.1 | 22.8 | 23.9 | 24.4 | 23.8 | 23.8 | 23.8 | 23.6 | 23.0 | 22.8 | 21.6 |
| Absolute minimum temperature (°C) | 18.2 | 20.0 | 21.3 | 23.0 | 23.2 | 22.5 | 22.9 | 22.6 | 22.6 | 20.3 | 20.8 | 16.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.4 | 11.7 | 12.1 | 12.4 | 12.7 | 12.9 | 12.8 | 12.6 | 12.2 | 11.8 | 11.5 | 11.4 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.5 | 10.9 | 11.2 | 11.5 | 11.2 | 9.8 | 10.8 | 10.4 | 11.0 | 8.7 | 10.2 | 10.5 |
| Precipitation (mm) | 5 | 0 | 61 | 65 | 140 | 248 | 254 | 322 | 164 | 434 | 121 | 6 |
| Sunny days | 20 | 27 | 16 | 11 | 5 | 2 | 3 | 6 | 1 | 0 | 8 | 20 |
| Rainy days | 11 | 1 | 15 | 19 | 26 | 28 | 28 | 25 | 29 | 31 | 22 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Usulután is at