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

Average October temperatures in Puerto Rico

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

Average total precipitation in October. Days are when it rains at least 0.01 inches (0.25 millimetres).

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.