Climate averages 1991–2020
Weather in Puerto Rico in January
In January, average daytime highs across the 7 cities listed in Puerto Rico range from 27.1°C in Caguas to 28.8°C in Mayagüez. Monthly rainfall ranges from 16 mm in Mayagüez to 49 mm in Caguas.
Long-term climate patterns, not a forecast for a particular trip.
City by city
January in Puerto Rico
| City | Average highHigh / low | Average low | Rainfall mm | Rain days |
|---|---|---|---|---|
| San Juan | 28.0°C21.5°C | 21.5°C | 39 | 10.4 |
| Bayamón | 27.9°C21.5°C | 21.5°C | 38 | 9.9 |
| Carolina | 27.6°C21.8°C | 21.8°C | 39 | 10.4 |
| Ponce | 28.0°C21.8°C | 21.8°C | 22 | 7.0 |
| Arecibo | 28.3°C21.5°C | 21.5°C | 41 | 9.5 |
| Caguas | 27.1°C21.7°C | 21.7°C | 49 | 15.7 |
| Mayagüez | 28.8°C22.8°C | 22.8°C | 16 | 4.9 |
A rain day is a local calendar day with at least 1 mm of precipitation.