Average annual temperature is 27.8 °C
Absolute maximum temperature: 39.4 °C
Absolute minimum temperature: 19.7 °C
Number of sunny days: 104 days
Number of rainy days: 261 days
Look at detailed online map of San Juan Nonualco
* Weather data for San Juan Nonualco 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) | 38.3 | 39.4 | 38.1 | 39.0 | 39.4 | 34.7 | 37.8 | 35.4 | 35.4 | 33.8 | 34.5 | 36.5 |
| Average daytime temperature (°C) | 34.1 | 36.0 | 34.5 | 35.0 | 34.7 | 32.0 | 33.7 | 32.2 | 33.1 | 30.7 | 32.2 | 34.5 |
| Average temperature (°C) | 27.1 | 28.5 | 28.1 | 28.8 | 29.1 | 27.5 | 28.2 | 27.6 | 27.9 | 26.3 | 26.7 | 27.8 |
| Average night temperature (°C) | 22.2 | 23.2 | 23.5 | 24.2 | 24.6 | 24.0 | 24.1 | 23.9 | 23.8 | 23.3 | 22.7 | 23.2 |
| Absolute minimum temperature (°C) | 19.9 | 21.0 | 21.5 | 22.5 | 22.9 | 23.1 | 22.6 | 22.9 | 22.5 | 22.1 | 19.7 | 21.4 |
| 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 | 11.3 |
| 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) | 10.5 | 10.9 | 11.3 | 11.5 | 11.3 | 9.9 | 10.8 | 10.1 | 10.9 | 8.3 | 9.9 | 10.4 |
| Precipitation (mm) | 8 | 0 | 56 | 70 | 154 | 337 | 302 | 320 | 239 | 408 | 216 | 8 |
| Sunny days | 20 | 25 | 12 | 9 | 4 | 2 | 2 | 2 | 2 | 0 | 8 | 18 |
| Rainy days | 11 | 3 | 19 | 21 | 27 | 28 | 29 | 29 | 28 | 31 | 22 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan Nonualco is at