July Weather in Puerto Rico

The tables below give the normal July 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 July temperatures in Puerto Rico

High °F	Low °F	Place	High °C	Low °C
88	74	Aguirre	31	23
81	68	Aibonito	27	20
90	70	Caguas	32	21
89	77	Ceiba	32	25
86	73	Dorado	30	23
90	78	Guayama	32	25
86	73	Isabela	30	23
88	72	Juncos	31	22
90	76	La Parguera	32	24
92	70	Lajas	34	21
88	76	Levittown	31	24
86	72	Manati	30	22
80	67	Maricao	27	20
90	73	Mayagüez	32	23
92	73	Mona Island	34	23
70	63	Pico Del Este	21	17
92	69	Ponce	33	21
89	78	San Juan	32	25

Ocean Temperature at San Juan, Puerto Rico averages 81 degrees Fahrenheit (27 degrees Celsius) in July.

Rainfall

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

Days	Place	Inches	Milli­metres
10	Aguirre	3.6	91
14	Aibonito	4.7	118
17	Caguas	5.9	151
19	Ceiba	4.3	109
17	Dorado	7.1	180
17	Guayama	5.5	139
15	Isabela	5.0	128
16	Juncos	7.0	179
–	La Parguera	2.7	68
9	Lajas	3.5	89
–	Levittown	7.1	180
14	Manati	5.4	136
–	Maricao	8.0	204
13	Mayagüez	5.8	148
12	Mona Island	2.3	58
8	Ponce	2.8	72
19	San Juan	6.0	153

Relative Humidity at San Juan, Puerto Rico in July averages 79 percent in the morning and 67 percent in the afternoon.

Hurricanes and Tropical Storms

Puerto Rico expects no hurricanes in July, although there's a two percent chance this month that a named tropical storm will approach land.