Rainfall: The average rainfall in Puerto Rico at the end of October is between 4 and 6 inches (102 to 152 millimeters).
Humidity: The average humidity in Puerto Rico at the end of October is between 75% and 85%.
Wind Speed: The average wind speed in Puerto Rico at the end of October is between 10 and 15 miles per hour (16 to 24 kilometers per hour).
Water Temperature: The average water temperature in Puerto Rico at the end of October is between 80°F (27°C) and 84°F (29°C).