October Weather in Puerto Rico
The tables below give the normal October temperatures and rainfall for cities and popular vacation spots in Puerto Rico. There's also information here on hurricanes, plus this month's average humidity and ocean temperature.
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 |
|---|---|---|---|---|
| 88 | 72 | Aguirre | 31 | 22 |
| 80 | 68 | Aibonito | 27 | 20 |
| 90 | 69 | Caguas | 32 | 21 |
| 88 | 76 | Ceiba | 31 | 24 |
| 86 | 72 | Dorado | 30 | 22 |
| 89 | 76 | Guayama | 32 | 24 |
| 86 | 72 | Isabela | 30 | 22 |
| 87 | 71 | Juncos | 31 | 22 |
| 90 | 75 | La Parguera | 32 | 24 |
| 91 | 70 | Lajas | 33 | 21 |
| 88 | 75 | Levittown | 31 | 24 |
| 87 | 71 | Manati | 30 | 22 |
| 80 | 67 | Maricao | 27 | 19 |
| 90 | 73 | Mayagüez | 32 | 23 |
| 91 | 72 | Mona Island | 33 | 22 |
| 71 | 64 | Pico Del Este | 22 | 18 |
| 91 | 68 | Ponce | 33 | 20 |
| 89 | 77 | San Juan | 31 | 25 |
Ocean Temperature at San Juan, Puerto Rico averages 83 degrees Fahrenheit (28 degrees Celsius) in October.
Rainfall
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 11 | Aguirre | 5.7 | 144 |
| 16 | Aibonito | 8.0 | 202 |
| 18 | Caguas | 7.0 | 177 |
| 18 | Ceiba | 5.8 | 146 |
| 16 | Dorado | 6.4 | 162 |
| 18 | Guayama | 7.2 | 183 |
| 17 | Isabela | 7.0 | 177 |
| 17 | Juncos | 7.6 | 193 |
| – | La Parguera | 6.3 | 159 |
| 14 | Lajas | 6.3 | 161 |
| – | Levittown | 7.1 | 181 |
| 15 | Manati | 5.7 | 144 |
| – | Maricao | 13.7 | 347 |
| 14 | Mayagüez | 6.5 | 165 |
| 13 | Mona Island | 4.5 | 114 |
| 13 | Ponce | 5.4 | 137 |
| 18 | San Juan | 5.2 | 132 |
Relative Humidity at San Juan, Puerto Rico in October averages 80 percent in the morning and 67 percent in the afternoon.
Hurricanes and Tropical Storms
No hurricanes are expected near Puerto Rico in October. Chances that a named tropical storm will affect Puerto Rico this month are around four percent.
References
NOAA National Centers for Environmental Information (NCEI). Climate Normals.
National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).
NOAA. National Weather Service. National Hurricane Center.