Average annual temperature is 26.1 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 16.0 °C
Number of sunny days: 117 days
Number of rainy days: 248 days
Look at detailed online map of San Juan Opico
* Weather data for San Juan Opico 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) | 35.2 | 36.1 | 37.8 | 37.9 | 39.0 | 35.4 | 37.0 | 34.8 | 36.5 | 34.2 | 35.2 | 35.7 |
| Average daytime temperature (°C) | 33.2 | 34.1 | 34.5 | 35.7 | 35.2 | 32.3 | 33.6 | 32.9 | 33.7 | 31.8 | 31.1 | 33.2 |
| Average temperature (°C) | 25.0 | 25.7 | 25.9 | 27.0 | 27.6 | 25.9 | 26.7 | 26.4 | 26.5 | 25.3 | 25.2 | 25.7 |
| Average night temperature (°C) | 19.3 | 19.7 | 20.3 | 21.3 | 22.2 | 21.8 | 22.0 | 22.2 | 22.0 | 21.4 | 20.8 | 20.2 |
| Absolute minimum temperature (°C) | 16.0 | 17.8 | 18.6 | 19.7 | 20.9 | 20.6 | 20.6 | 21.1 | 21.0 | 19.6 | 17.4 | 16.7 |
| 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 | 12.8 | 12.9 | 12.9 | 12.6 | 12.2 | 11.8 | 11.5 | 11.3 |
| 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) | 10.4 | 10.9 | 11.2 | 11.5 | 11.1 | 10.5 | 10.8 | 10.5 | 10.6 | 9.5 | 9.9 | 10.4 |
| Precipitation (mm) | 7 | 1 | 16 | 28 | 91 | 190 | 164 | 169 | 159 | 179 | 116 | 5 |
| Sunny days | 20 | 23 | 14 | 14 | 10 | 0 | 4 | 3 | 1 | 1 | 7 | 20 |
| Rainy days | 11 | 5 | 17 | 16 | 21 | 30 | 27 | 28 | 29 | 30 | 23 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan Opico is at