January Weather in Puerto Rico





The tables below give the normal January 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 January temperatures in Puerto Rico
High °F Low °F Place High °C Low °C
84 66 Aguirre 29 19
74 62 Aibonito 23 17
85 62 Caguas 29 17
83 71 Ceiba 28 22
79 67 Dorado 26 20
85 72 Guayama 30 22
81 67 Isabela 27 19
82 65 Juncos 28 18
86 70 La Parguera 30 21
87 62 Lajas 31 17
82 70 Levittown 28 21
81 66 Manati 27 19
76 62 Maricao 24 17
85 68 Mayagüez 29 20
85 69 Mona Island 29 20
66 59 Pico Del Este 19 15
88 63 Ponce 31 17
83 72 San Juan 28 22

Ocean Temperature at San Juan, Puerto Rico averages 77 degrees Fahrenheit (25 degrees Celsius) in January.

Rainfall

Average total precipitation in January. Days are when it rains at least 0.01 inches (0.25 millimetres).
Days Place Inches Milli­metres
7 Aguirre 1.3 32
16 Aibonito 3.8 95
20 Caguas 3.7 94
16 Ceiba 2.6 67
17 Dorado 5.6 142
15 Guayama 2.4 61
13 Isabela 3.7 95
16 Juncos 3.3 83
La Parguera 1.9 49
8 Lajas 2.2 56
Levittown 4.8 121
15 Manati 5.1 129
Maricao 3.7 93
5 Mayagüez 1.2 30
11 Mona Island 1.6 41
6 Ponce 0.7 19
18 San Juan 4.1 103

Relative Humidity at San Juan, Puerto Rico in January averages 82 percent in the morning and 65 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
Back to Top