Guanica Weather in January
January in Guanica brings high temperatures, with highs of 29°C (84°F) and nights dropping to 23°C (73°F). It's also the driest month of the year, ideal for those who want to avoid rain.
Rainfall in Guanica in January
With the driest weather of the year, this month is ideal for outdoor fun. Looking at the last 30 years, the data shows about 19 days with rain, averaging 22 mm (0.9 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Guanica in January
January is a excellent month in Guanica, with 29°C (84°F) during the day and 23°C (73°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are mild at around 23°C (73°F), which is comfortable for most people.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Guanica Temperature in January
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Guanica Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guanica - and find the best time to visit.
Daily Historical Temperatures
50-year average (1977-2026)
Based on our historical records, temperatures in Guanica typically stay consistent throughout January, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 20°C (68°F).
Average temperatures in January
Historical weather records for Guanica in January
Browse day-by-day weather records for Guanica spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guanica historical weather extremes in January
Based on weather observations in Guanica between 2000 and 2025, these are the recorded extremes during January.
- Guanica recorded its highest January temperature of 33°C (91°F) on January 1, 2001.
- Guanica experienced its chilliest January day on January 25, 2017, reaching only 26°C (79°F).
- Guanica registered its coldest January night on January 20, 2000, with temperatures dropping to 13°C (55°F).
Best Places in Puerto Rico in January
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in January →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Guanica in January
Warm weather calls for comfortable, breathable clothing in January. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers.
What To Do in Guanica in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Guanica 3-Day Forecast
See the full Guanica climate overview or explore weather in Puerto Rico.
Popular in January
Where to go in January - average daytime high across popular destinations.
San Juan
28°C (82°F) Rio Grande28°C (82°F) Aguada
28°C (82°F) Luquillo27°C (81°F) Culebra27°C (81°F) Rincon28°C (82°F) Vieques27°C (81°F) Fajardo27°C (81°F) 
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