Average annual temperature is 26.4 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: 16.8 °C
Number of sunny days: 64 days
Number of rainy days: 301 days
Look at detailed online map of Guaynabo
* Weather data for Guaynabo 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) | 30.1 | 30.5 | 32.8 | 32.4 | 34.0 | 35.5 | 34.1 | 34.4 | 34.9 | 34.3 | 32.4 | 32.2 |
| Average daytime temperature (°C) | 28.3 | 28.6 | 30.1 | 30.3 | 32.6 | 33.9 | 32.4 | 32.5 | 33.0 | 31.8 | 30.5 | 29.0 |
| Average temperature (°C) | 23.4 | 23.7 | 24.4 | 24.9 | 27.0 | 28.7 | 28.3 | 28.3 | 28.5 | 27.5 | 26.6 | 25.3 |
| Average night temperature (°C) | 19.8 | 19.9 | 19.7 | 20.5 | 22.4 | 24.5 | 24.8 | 25.2 | 24.9 | 24.3 | 23.5 | 22.3 |
| Absolute minimum temperature (°C) | 17.9 | 17.2 | 16.8 | 18.1 | 20.8 | 23.3 | 23.2 | 23.9 | 23.6 | 22.9 | 21.5 | 19.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 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) | 10.0 | 10.7 | 11.0 | 11.0 | 11.5 | 11.8 | 10.9 | 10.3 | 10.9 | 9.5 | 9.1 | 10.0 |
| Precipitation (mm) | 71 | 38 | 30 | 85 | 84 | 67 | 88 | 130 | 75 | 144 | 66 | 44 |
| Sunny days | 4 | 8 | 7 | 2 | 5 | 9 | 8 | 2 | 1 | 3 | 6 | 9 |
| Rainy days | 27 | 20 | 24 | 28 | 26 | 21 | 23 | 29 | 29 | 28 | 24 | 22 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Guaynabo is at