May Weather in Puerto Rico





The tables below give the normal May temperatures and rainfall for cities and popular vacation spots in Puerto Rico. There's also information here on this month's average humidity and ocean temperature at San Juan.

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 May temperatures in Puerto Rico
High °F Low °F Place High °C Low °C
86 72 Aguirre 30 22
80 66 Aibonito 26 19
89 69 Caguas 32 21
87 75 Ceiba 30 24
86 72 Dorado 30 22
88 76 Guayama 31 24
85 71 Isabela 29 22
86 71 Juncos 30 21
88 75 La Parguera 31 24
90 69 Lajas 32 20
87 74 Levittown 30 23
85 70 Manati 30 21
78 65 Maricao 26 18
89 71 Mayagüez 31 22
90 71 Mona Island 32 22
69 62 Pico Del Este 21 17
90 67 Ponce 32 19
87 76 San Juan 31 24

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

Rainfall

Average total precipitation in May. Days are when it rains at least 0.01 inches (0.25 millimetres).
Days Place Inches Milli­metres
9 Aguirre 4.5 115
14 Aibonito 5.5 141
18 Caguas 5.4 137
15 Ceiba 6.7 170
14 Dorado 6.3 159
16 Guayama 5.3 134
15 Isabela 7.2 183
17 Juncos 6.4 162
La Parguera 4.1 103
10 Lajas 4.4 112
Levittown 7.0 177
14 Manati 6.2 158
Maricao 10.4 264
11 Mayagüez 6.0 152
12 Mona Island 4.9 125
10 Ponce 4.2 106
17 San Juan 5.5 141

Relative Humidity at San Juan, Puerto Rico in May averages 78 percent in the morning and 66 percent in the afternoon.

References

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).

Puerto Rico
Temperature & Rainfall
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