August Weather in Puerto Rico





The tables below give the normal August 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 measures of climate are averages of historical data collected at weather stations over several decades.

One site, Pico Del Este, is much cooler and rainier 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 August temperatures in Puerto Rico
High °F Low °F Place High °C Low °C
91 71 Arecibo 33 22
84 69 Cayey 29 20
87 73 Dorado 31 23
90 75 Fajardo 32 24
90 77 Guayama 32 25
88 72 Isabela 31 22
88 73 Manati 31 23
81 67 Maricao 27 20
91 71 Mayagüez 33 22
92 74 Mona Island 33 23
71 64 Pico Del Este 22 18
92 74 Ponce 33 23
89 73 Rincón 32 23
89 78 San Juan 32 26
93 68 San Sebastián 34 20
90 67 Utuado 32 19

Ocean Temperature at San Juan, Puerto Rico averages 83 degrees Fahrenheit (28 degrees Celsius) in August.

Rainfall

Average total precipitation in August. Days are when it rains at least 0.01 inches (0.25 millimetres).
Days Place Inches Milli­metres
10 Arecibo 4.6 116
16 Cayey 5.6 141
14 Dorado 5.8 147
15 Fajardo 5.4 137
16 Guayama 5.9 150
16 Isabela 6.1 154
13 Manati 4.7 118
Maricao 10.7 272
15 Mayagüez 8.3 211
11 Mona Island 3.7 93
30 Pico Del Este 15.2 387
10 Ponce 4.2 106
Rincón 6.9 176
19 San Juan 5.5 139
15 Utuado 9.1 230

Relative Humidity at San Juan, Puerto Rico in August averages 80 percent in the morning and 67 percent in the afternoon.

Hurricanes and Tropical Storms

With hurricane season in full swing, there's about a two percent chance of a hurricane approaching Puerto Rico in August. The likelihood of a named tropical coming within 100 miles (165 kilometres) of land is 12 percent for most of Puerto Rico and 14 percent in the southeast.

References

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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

NOAA. National Weather Service. National Hurricane Center.

Puerto Rico
Temperature & Rainfall
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