Average annual temperature is 25.5 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 39 days
Number of rainy days: 326 days
Look at detailed online map of Río Grande Zona Urbana
* Weather data for Río Grande Zona Urbana 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) | 27.7 | 26.3 | 29.9 | 29.7 | 31.4 | 31.4 | 31.6 | 32.7 | 32.7 | 32.5 | 30.4 | 29.0 |
| Average daytime temperature (°C) | 25.8 | 25.5 | 26.6 | 27.2 | 29.3 | 30.1 | 29.8 | 30.4 | 31.0 | 30.1 | 28.8 | 27.1 |
| Average temperature (°C) | 23.2 | 23.1 | 23.5 | 24.1 | 26.0 | 27.0 | 27.0 | 27.1 | 27.5 | 26.6 | 26.0 | 24.4 |
| Average night temperature (°C) | 21.4 | 21.3 | 21.2 | 21.8 | 23.5 | 24.6 | 24.7 | 24.7 | 24.9 | 24.2 | 24.0 | 22.4 |
| Absolute minimum temperature (°C) | 19.4 | 19.5 | 18.5 | 18.9 | 22.1 | 22.8 | 22.4 | 23.0 | 23.5 | 22.4 | 22.3 | 19.8 |
| 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 | 11.5 | 12.0 | 12.6 | 13.0 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.0 |
| 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) | 9.9 | 10.6 | 10.9 | 10.9 | 11.3 | 11.7 | 10.5 | 10.1 | 11.0 | 9.1 | 9.2 | 9.7 |
| Precipitation (mm) | 104 | 85 | 41 | 127 | 60 | 91 | 153 | 171 | 75 | 246 | 69 | 89 |
| Sunny days | 4 | 2 | 5 | 2 | 6 | 3 | 2 | 1 | 3 | 3 | 2 | 6 |
| Rainy days | 27 | 26 | 26 | 28 | 25 | 27 | 29 | 30 | 27 | 28 | 28 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Río Grande Zona Urbana is at