December Weather in Puerto Rico





The tables below give the normal December 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 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 December temperatures in Puerto Rico
High °F Low °F Place High °C Low °C
87 66 Arecibo 30 19
78 63 Cayey 26 17
83 68 Dorado 28 20
85 71 Fajardo 30 21
86 73 Guayama 30 23
83 68 Isabela 28 20
83 68 Manati 28 20
76 63 Maricao 25 17
87 68 Mayagüez 30 20
86 70 Mona Island 30 21
67 60 Pico Del Este 19 16
88 68 Ponce 31 20
84 69 Rincón 29 21
84 73 San Juan 29 23
89 64 San Sebastián 32 18
85 62 Utuado 29 17

Ocean Temperature at San Juan, Puerto Rico averages 80 degrees Fahrenheit (27 degrees Celsius) in December.

Rainfall

Average total precipitation in December. Days are when it rains at least 0.01 inches (0.25 millimetres).
Days Place Inches Milli­metres
12 Arecibo 4.8 121
18 Cayey 3.9 100
17 Dorado 6.1 155
15 Fajardo 5.8 146
14 Guayama 2.8 71
14 Isabela 4.7 118
15 Manati 5.9 149
Maricao 3.3 83
7 Mayagüez 2.0 51
11 Mona Island 2.7 67
28 Pico Del Este 15.9 403
7 Ponce 1.4 35
Rincón 3.3 84
20 San Juan 5.0 128
11 Utuado 3.6 92

Relative Humidity at San Juan, Puerto Rico in December averages 82 percent in the morning and 66 percent in the afternoon.

References

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

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

Puerto Rico
Temperature & Rainfall
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