Average annual temperature is 25.5 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 15.6 °C
Number of sunny days: 94 days
Number of rainy days: 271 days
Look at detailed online map of San Juan
* Weather data for San Juan Guatemala is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 34.1 | 35.3 | 36.4 | 37.7 | 37.6 | 34.6 | 35.5 | 35.1 | 34.8 | 32.4 | 34.5 | 35.5 |
| Average daytime temperature (°C) | 32.1 | 32.8 | 33.5 | 34.5 | 34.3 | 32.1 | 32.9 | 32.8 | 32.6 | 30.6 | 31.4 | 31.9 |
| Average temperature (°C) | 24.7 | 25.2 | 25.5 | 26.5 | 27.0 | 25.7 | 26.2 | 25.9 | 25.3 | 24.4 | 25.0 | 24.8 |
| Average night temperature (°C) | 19.2 | 19.6 | 20.1 | 20.7 | 21.7 | 21.8 | 21.4 | 21.0 | 20.5 | 20.5 | 20.0 | 19.4 |
| Absolute minimum temperature (°C) | 15.9 | 17.7 | 18.1 | 19.1 | 20.3 | 20.3 | 20.1 | 20.1 | 18.6 | 19.2 | 17.1 | 15.6 |
| 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 | 12.5 | 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) | 10.5 | 10.9 | 11.3 | 11.4 | 11.0 | 10.4 | 10.8 | 10.2 | 10.2 | 9.6 | 10.1 | 10.4 |
| Precipitation (mm) | 6 | 2 | 30 | 51 | 163 | 209 | 224 | 195 | 309 | 297 | 77 | 10 |
| Sunny days | 20 | 25 | 6 | 8 | 3 | 0 | 0 | 0 | 0 | 2 | 10 | 20 |
| Rainy days | 11 | 3 | 25 | 22 | 28 | 30 | 31 | 31 | 30 | 29 | 20 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan is at