As trade winds bring cooling breezes off of the Atlantic, Puerto Rico begins to see temperatures cooling off a bit in October. Travelers should be advised that severe tropical weather is still a possibility during this month, although not as great as during August and September.
Typical Weather in October
Temperatures in Puerto Rico during October generally vary between an average high during the day of 88.0 degrees and an average low at night of 75.0 degrees
| Monthly Averages | | High | Low | Rainfall (inches) | No. of Days with Rain |
| 88.0° F |
75.0° F |
5.5 |
N.A. |
|
On any given day during October in Puerto Rico, you can expect early morning temperatures to be around 79.8 degrees.
The temperature will rise over the course of the typical October day, reaching somewhere around 86.0 degrees by early afternoon.
By early evening, temperatures in Puerto Rico generally decline to around 79.9 degrees.
Overall, temperatures in Puerto Rico during October average around 80.8 degrees.
| Early Morning | Late Morning | Early Afternoon | Late Afternoon | Early Evening | Overall |
| 79.8° F |
85.8° F |
86.0° F |
83.5° F |
79.9° F |
80.8° F |
|
Rain
During October, rain is most likely to occur around 2:00 PM, and least likely to occur around 2:00 AM.
As shown below, if a thunderstorm occurs in October, it is most likely to occur around 2:00 PM.
| Percent Frequencies of Hourly Observations | | Hour | Rain and/or Drizzle | Thunder- storms |
| 2:00 AM |
5.4 % |
0.7 % |
| 5:00 AM |
6.3 % |
0.6 % |
| 8:00 AM |
5.8 % |
0.4 % |
| 11:00 AM |
5.4 % |
0.6 % |
| 2:00 PM |
9.5 % |
5.2 % |
| 5:00 PM |
9 % |
2.8 % |
| 8:00 PM |
6.6 % |
0.7 % |
| 11:00 PM |
6.8 % |
0.9 % |
| ALL |
6.9 % |
1.5 % |
|
|