Annual Average Temperatures & Rainfall in Puerto Rico
The tables below give the annual average temperatures and rainfall for cities and popular vacation spots in Puerto Rico. There's also information here on the average humidity and ocean temperature at San Juan.
The temperature and rain measurements are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.
One site, Pico Del Este, is much cooler than others on the list. That's because it's a high mountain peak, at 3448 feet (1050 metres) elevation, in the El Yunque Caribbean National Forest.
Temperature
| High °F | Low °F | Place | High °C | Low °C |
|---|---|---|---|---|
| 78 | 70 | Aguirre | 26 | 21 |
| 72 | 65 | Aibonito | 22 | 19 |
| 77 | 67 | Caguas | 25 | 19 |
| 81 | 75 | Ceiba | 27 | 24 |
| 77 | 71 | Dorado | 25 | 22 |
| 81 | 75 | Guayama | 27 | 24 |
| 77 | 70 | Isabela | 25 | 21 |
| 77 | 69 | Juncos | 25 | 21 |
| 81 | 73 | La Parguera | 27 | 23 |
| 78 | 67 | Lajas | 26 | 19 |
| 80 | 73 | Levittown | 26 | 23 |
| 77 | 69 | Manati | 25 | 21 |
| 71 | 65 | Maricao | 22 | 18 |
| 79 | 70 | Mayagüez | 26 | 21 |
| 80 | 71 | Mona Island | 27 | 22 |
| 65 | 62 | Pico Del Este | 18 | 17 |
| 78 | 66 | Ponce | 26 | 19 |
| 81 | 75 | San Juan | 27 | 24 |
Ocean Temperature at San Juan, Puerto Rico averages 81 degrees Fahrenheit (27 degrees Celsius).
Rainfall
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 103 | Aguirre | 40.4 | 1025 |
| 171 | Aibonito | 61.8 | 1569 |
| 215 | Caguas | 64.8 | 1645 |
| 196 | Ceiba | 50.9 | 1292 |
| 177 | Dorado | 65.9 | 1673 |
| 185 | Guayama | 54.4 | 1382 |
| 169 | Isabela | 64.1 | 1627 |
| 189 | Juncos | 67.5 | 1714 |
| – | La Parguera | 42.5 | 1079 |
| 116 | Lajas | 44.9 | 1141 |
| – | Levittown | 75.4 | 1914 |
| 163 | Manati | 61.9 | 1572 |
| – | Maricao | 92.9 | 2360 |
| 125 | Mayagüez | 51.3 | 1302 |
| 127 | Mona Island | 38.8 | 986 |
| 107 | Ponce | 37.5 | 953 |
| 208 | San Juan | 59.9 | 1521 |
Relative Humidity at San Juan, Puerto Rico over the year averages 79 percent in the morning and 65 percent in the afternoon.
References
NOAA National Centers for Environmental Information (NCEI). Climate Normals.
National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).