January Weather in Puerto Rico

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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 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 January temperatures in Puerto Rico
High °F Low °F Place High °C Low °C
86 64 Arecibo 30 18
78 62 Cayey 25 17
79 66 Dorado 26 19
84 69 Fajardo 29 21
85 72 Guayama 29 22
82 66 Isabela 28 19
82 67 Manati 28 19
76 62 Maricao 25 17
86 65 Mayagüez 30 19
85 69 Mona Island 29 21
66 59 Pico Del Este 19 15
87 67 Ponce 31 20
84 66 Rincón 29 19
83 72 San Juan 28 22
89 62 San Sebastián 32 17
85 60 Utuado 29 15

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
  9 Arecibo   2.7   68
18 Cayey   3.3   83
16 Dorado   5.5 139
16 Fajardo   4.4 112
13 Guayama   2.5   63
13 Isabela   3.5   89
14 Manati   4.7 118
  – Maricao   3.4   87
  6 Mayagüez   1.1   29
10 Mona Island   1.8   45
28 Pico Del Este 13.1 333
  7 Ponce   0.9   23
  – Rincón   2.2   55
18 San Juan   3.8   96
11 Utuado   2.6   67

Relative Humidity at San Juan, Puerto Rico in January averages 82 percent in the morning and 65 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).

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Average Weather

Puerto Rico
Temperature & Rainfall

WEATHER AVERAGES
Weather Extremes