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Best time to visit · Puerto Rico, United States
For the most comfortable weather in Old San Juan, aim for December – March. February tops our comfort score at 82/100, with highs around 82°F (28°C) and 1.8 in (45 mm) of rain. April is a good shoulder-season month. The toughest months are August – October, mainly because of cloud cover.
Highs run from 82°F to 87°F across the year, and the yearly total is about 47.5 in (1207 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 82°F28°C | 82°F28°C | 83°F28°C | 84°F29°C | 85°F29°C | 86°F30°C | 86°F30°C | 87°F30°C | 86°F30°C | 85°F30°C | 83°F29°C | 82°F28°C |
| Avg low | 74°F23°C | 74°F23°C | 74°F23°C | 75°F24°C | 77°F25°C | 79°F26°C | 79°F26°C | 80°F27°C | 80°F27°C | 79°F26°C | 78°F25°C | 76°F24°C |
| Rain | 2.0 in51 mm | 1.8 in45 mm | 2.4 in61 mm | 3.0 in77 mm | 5.1 in129 mm | 3.5 in90 mm | 3.9 in100 mm | 5.1 in130 mm | 6.4 in162 mm | 6.3 in161 mm | 5.4 in137 mm | 2.5 in64 mm |
| Humidity | 77% | 75% | 73% | 74% | 77% | 79% | 79% | 79% | 79% | 80% | 80% | 79% |
| Cloud | 63% | 61% | 63% | 64% | 74% | 72% | 67% | 66% | 68% | 67% | 65% | 61% |
| Comfort | 80 | 82 | 79 | 73 | 60 | 62 | 61 | 57 | 53 | 55 | 63 | 77 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 60 m (197 ft), close to Old San Juan's own ~11 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
Temperatures barely move through the year in Old San Juan (highs stay between 82°F and 87°F), so rain is what really separates the seasons.
Expect steady highs of 82–86°F (28–30°C). It's the driest half, with only about 15.3 in (388 mm) of rain, 32% of the year's total. June and December – February feel humid, with humidity near 77%. Comfort peaks here: December – March rank with the year's best, and the season averages 76/100.
Temperatures hold fairly even, with highs of 83–87°F (29–30°C). It's the wettest half, with about 32.2 in (819 mm) of rain, 68% of the year's total. May and July – November feel humid, with humidity near 77%. It holds the toughest stretch on our comfort score (August – October), averaging 58/100.
By comfort score: 4 Great, 5 Good and 3 Fair. Great months: December – March. Tap a month for its own guide.
For the most comfortable weather in Old San Juan, aim for December – March. February tops our comfort score at 82/100, with highs around 82°F (28°C) and 1.8 in (45 mm) of rain. April is a good shoulder-season month. The toughest months are August – October, mainly because of cloud cover.
September is the wettest month, averaging about 6.4 in (162 mm) of rain. February is the driest, with about 1.8 in (45 mm). The yearly total is around 47.5 in (1207 mm).
February is the coldest, with average lows of 74°F (23°C) and highs of 82°F (28°C). The warmest is August, with average highs of 87°F (30°C).
Yes for much of the year: humidity averages 78% annually, and May – February combine warmth with 75%+ humidity, which feels sticky.
The wettest three-month stretch is September – November, with about 18.1 in (460 mm) of rain combined. The driest stretch is January – March, with about 6.2 in (157 mm).
Poll the group on December – March dates, then plan the days, packing and costs together.
