Average annual temperature is 25.6 °C
Absolute maximum temperature: 35.3 °C
Absolute minimum temperature: 15.7 °C
Number of sunny days: 40 days
Number of rainy days: 325 days
Look at detailed online map of San Germán
* Weather data for San Germán Puerto Rico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.3 | 31.3 | 30.7 | 30.8 | 32.5 | 34.4 | 34.9 | 35.3 | 34.6 | 34.0 | 31.7 | 32.6 |
| Average daytime temperature (°C) | 28.5 | 29.5 | 29.3 | 29.2 | 31.0 | 32.2 | 32.8 | 32.3 | 32.6 | 31.9 | 30.4 | 30.4 |
| Average temperature (°C) | 23.2 | 23.5 | 23.6 | 24.2 | 26.5 | 27.6 | 27.4 | 27.3 | 27.4 | 26.9 | 25.6 | 24.5 |
| Average night temperature (°C) | 19.2 | 19.0 | 18.8 | 20.0 | 22.9 | 24.0 | 23.1 | 23.7 | 23.4 | 23.8 | 22.1 | 20.2 |
| Absolute minimum temperature (°C) | 16.1 | 17.0 | 15.7 | 18.0 | 20.0 | 22.3 | 21.8 | 21.6 | 21.8 | 21.6 | 19.5 | 18.2 |
| 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) | 11.2 | 11.6 | 12.0 | 12.6 | 13.0 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.2 | 10.1 | 10.8 | 10.9 | 11.4 | 11.8 | 10.8 | 9.6 | 10.8 | 9.8 | 9.4 | 9.9 |
| Precipitation (mm) | 46 | 40 | 61 | 129 | 71 | 82 | 95 | 131 | 103 | 112 | 111 | 50 |
| Sunny days | 7 | 3 | 8 | 1 | 5 | 2 | 3 | 0 | 1 | 2 | 2 | 6 |
| Rainy days | 24 | 25 | 23 | 29 | 26 | 28 | 28 | 31 | 29 | 29 | 28 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Germán is at