Start of the wetter season · Weather & things to do
Old San Juan in July
Little changes in Old San Juan from June: highs stay near 86°F (30°C), lows near 79°F (26°C), and about 3.9 in (100 mm) of rain falls.
Our comfort score puts it mid-table at 61/100, 8th of 12.
- Avg high
- 86°F (30°C)
- Avg low
- 79°F (26°C)
- Rain
- 3.9 in (100 mm)
- Humidity
- 79%
- Cloud cover
- 67%
- Daylight
- ~13 h 00 min
- Comfort score
- 61/100 · Good
What July feels like
Afternoons run hot at about 86°F (30°C), which leaves mornings and evenings as the time for walking.
Nights stay warm too, with lows averaging 79°F (26°C).
With 79% average humidity, it feels muggy.
Showers are part of the month, adding up to about 3.9 in (100 mm).
Plan around July
July sits mid-table; the best months are December – March.
- Comfort holds steady from June (62 → 61/100).
- Our Old San Juan & Ponce route is planned for Dec – mid-Jan, a window set by the holiday season rather than the weather — July falls outside it.
What to pack for July
- Light, breathable clotheshighs average 86°F
- Sunscreen, sunglasses and a hatstrong sun this month
- Refillable water bottleeasy to dehydrate in the heat
- Quick-dry fabrics79% average humidity
- Packable rain jacket or umbrellaabout 3.9 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Old San Juan in July
Afternoons run hot (86°F), so these picks mix early-start outdoor spots with cool indoor breaks.
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 July scores 61/100 for comfort, good conditions for being outside.
Castillo San Cristobal
The largest Spanish fort in the Americas, completed in 1783, guarding the land approach to the old city.
Casa Cortes ChocoBar
Cafe run by the Cortes chocolate family, serving hot chocolate with cheese, chocolate dishes and breakfast.
Why now A break from 86°F afternoons.
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 Highs near 86°F and 3.9 in of monthly rain make this an easy outdoor pick.
Paseo de la Princesa
Tree-lined 19th-century promenade along the bay under the city walls, ending at the Raices fountain.
Why now One to do outside while the weather is on your side.
Nearby in July
- Ponce in July~46 mi · highs 87°F, 3.1 in rain · similar daytime temperatures, drier
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 July: quick answers
Is July a good time to visit Old San Juan?
It's middling, scoring 61/100. The best months are December – March, at up to 82. Expect highs of 86°F (30°C) and 3.9 in (100 mm) of rain.
How hot is Old San Juan in July?
Average highs are 86°F (30°C) and average lows 79°F (26°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Old San Juan in July?
Some: about 3.9 in (100 mm) of rain falls across July on average, the 6th-wettest month of the year. The annual total is about 47.5 in (1207 mm).
What should I pack for Old San Juan in July?
Bring light, breathable clothes (highs average 86°F), sunscreen, sunglasses and a hat (strong sun this month), refillable water bottle (easy to dehydrate in the heat), quick-dry fabrics (79% average humidity) and packable rain jacket or umbrella (about 3.9 in of rain).
More on Old San Juan
Planning Old San Juan in July?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.