San Juan in April
In April, San Juan averages 29°C (84°F) during the day and 23°C (73°F) at night, with around 11 days of rain (110 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
April offers comfortable temperatures in San Juan, with some rain to plan around.
How April compares to the rest of the year in San Juan
April is in the middle of the year for warmth in San Juan (9th of 12) and one of the driest months (10th of 12). Daytime temperature runs 1°C below the annual average (30°C). April runs roughly the same as March (29°C) and warms a further 1°C into May (30°C).
April sunrise & sunset in San Juan
Times shown for San Juan local time (America/Puerto_Rico), calculated for the 15th of April. They shift by a few minutes day to day across the month.
Photography light in San Juan — April
Golden-hour and blue-hour windows for the 15th of April, in San Juan's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Juan in April
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on April's tier (Shoulder) and San Juan's popularity.
Crowds & pricing — April in San Juan
San Juan is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — April in San Juan
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in San Juan — April
Across the year San Juan's sea swings from 26.5°C (February) to 30.4°C (October) — April sits at 27°C.
San Juan in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 28°C / 82°F | 21°C / 70°F | 75 mm | 11 | — |
| February | 28°C / 82°F | 21°C / 70°F | 55 mm | 9 | — |
| March | 29°C / 84°F | 22°C / 72°F | 55 mm | 9 | — |
| April | 29°C / 84°F | 23°C / 73°F | 110 mm | 11 | — |
| May | 30°C / 86°F | 24°C / 75°F | 155 mm | 14 | — |
| June | 31°C / 88°F | 25°C / 77°F | 130 mm | 14 | — |
| July | 31°C / 88°F | 25°C / 77°F | 150 mm | 16 | — |
| August | 32°C / 90°F | 25°C / 77°F | 165 mm | 16 | — |
| September | 31°C / 88°F | 25°C / 77°F | 145 mm | 15 | — |
| October | 31°C / 88°F | 24°C / 75°F | 130 mm | 13 | — |
| November | 30°C / 86°F | 23°C / 73°F | 140 mm | 13 | — |
| December | 29°C / 84°F | 22°C / 72°F | 110 mm | 12 | — |
Other cities with similar April weather
🌍 See the full ranked list of climate twins for San Juan in April →
Frequently asked questions
How hot is San Juan in April?
In April, San Juan averages a high of 29°C (84°F) and a low of 23°C (73°F) — generally warm.
Does it rain a lot in San Juan in April?
April can be fairly wet in San Juan, with about 11 rainy days on average.
Is April a good time to visit San Juan?
April is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Juan in April?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full April packing list for San Juan for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.