Middle of the drier season · Weather & things to do
Old San Juan in January
This is the coldest month in Old San Juan: highs average 82°F (28°C) and lows 74°F (23°C), with about 2.0 in (51 mm) of rain.
At 80/100 for comfort (2nd of 12), it's one of the best months to visit.
- Avg high
- 82°F (28°C)
- Avg low
- 74°F (23°C)
- Rain
- 2.0 in (51 mm)
- Humidity
- 77%
- Cloud cover
- 63%
- Daylight
- ~11 h 00 min
- Comfort score
- 80/100 · Great
What January feels like
Days are warm, averaging 82°F (28°C).
Nights stay warm too, with lows averaging 74°F (23°C).
With 77% average humidity, it feels muggy.
About 2.0 in (51 mm) of rain falls in a typical year's January.
Plan around January
January is one of Old San Juan's best months on the climate data.
- Comfort improves from 77/100 in December to 80/100.
- Our Old San Juan & Ponce route is planned for Dec – mid-Jan, a window set by the holiday season rather than the weather — January is part of it.
What to pack for January
- Light, breathable clotheshighs average 82°F
- Quick-dry fabrics77% average humidity
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Old San Juan in January
With conditions on your side, the picks below favor time outside.
Plaza de Armas
Main square of the old city, in front of City Hall, with the island's Christmas tree and lit trees in December.
Why now January scores 80/100 for comfort, good conditions for being outside.
Paseo de la Princesa
Tree-lined 19th-century promenade along the bay under the city walls, ending at the Raices fountain.
Why now Highs near 82°F and 2.0 in of monthly rain make this an easy outdoor pick.
Calle de la Fortaleza
Shop-lined street ending at La Fortaleza, the governor's mansion since the 16th century, hung with wreaths at Christmas.
Why now One to do outside while the weather is on your side.
Castillo San Cristobal
The largest Spanish fort in the Americas, completed in 1783, guarding the land approach to the old city.
La Factoria
Unsigned cocktail bar of linked rooms on Calle San Sebastian, with salsa dancing late into the night.
Nearby in January
- Ponce in January~46 mi · highs 83°F, 1.6 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Old San Juan in January: quick answers
Is January a good time to visit Old San Juan?
Yes. On the climate data it's one of the best months, scoring 80/100. Expect highs of 82°F (28°C) and 2.0 in (51 mm) of rain.
How hot is Old San Juan in January?
Average highs are 82°F (28°C) and average lows 74°F (23°C), making it the coldest month by daytime highs.
Does it rain a lot in Old San Juan in January?
Not much: about 2.0 in (51 mm) of rain falls across January on average, the 2nd-driest month of the year. The annual total is about 47.5 in (1207 mm).
What should I pack for Old San Juan in January?
Bring light, breathable clothes (highs average 82°F), quick-dry fabrics (77% average humidity) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Old San Juan
Routes in season in January
- Old San Juan & Ponce Dec – mid-Jan
Planning Old San Juan in January?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.