Year-round weather and climate in San Juan, Puerto Rico
Average temperatures in San Juan run from an average low of 22°C72°F in February up to an average high of 32°C90°F in June. January is the driest month at 15 rainy days; September the wettest at 22. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 418K
- Currency
- USD
- Language
- English / Spanish
- Time zone
- Puerto Rico
Best time to visit
The most pleasant weather falls in January, February, and March, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Moderate Showers: Rainfall is standard and manageable. A compact travel umbrella or light rain jacket will easily get you through any wet days.
Day-to-night swing
Evening Chill: Temperatures drop by a noticeable 7°C13°F when the sun goes down. A light sweater or jacket is usually all you need for evening plans.
Seasonality Profile
Tropical Rainforest: Unrelenting heat and high humidity. Frequent, heavy rainfall persists throughout the entire year.
Evening vibe
Cozy Indoor Culture: Evenings are generally crisp, damp, or sweltering. Nightlife centers around indoor venues.
Sightseeing stamina
Summer Heat Fatigue: Midday heat in May and June is intense. Pack high-SPF sunscreen and a wide-brimmed hat.
Average temperatures, sunshine, and rainfall
Average monthly weather in San Juan, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Jan is typically driest at 15 days (67mm); Sep the wettest at 22 days (126mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 28°C / 83°F | 22°C / 72°F | 11h | 15 | 67mm |
| Feb | 28°C / 82°F | 22°C / 72°F | 11h | 17 | 77mm |
| Mar | 29°C / 83°F | 22°C / 72°F | 11h | 17 | 61mm |
| Apr | 29°C / 85°F | 23°C / 73°F | 12h | 18 | 90mm |
| May | 31°C / 88°F | 24°C / 75°F | 12h | 18 | 80mm |
| Jun | 32°C / 89°F | 25°C / 77°F | 12h | 19 | 76mm |
| Jul | 31°C / 87°F | 25°C / 78°F | 12h | 21 | 96mm |
| Aug | 31°C / 88°F | 26°C / 78°F | 11h | 19 | 108mm |
| Sep | 31°C / 87°F | 25°C / 77°F | 11h | 22 | 126mm |
| Oct | 31°C / 87°F | 25°C / 76°F | 10h | 20 | 129mm |
| Nov | 29°C / 85°F | 24°C / 75°F | 10h | 18 | 118mm |
| Dec | 28°C / 83°F | 23°C / 73°F | 11h | 17 | 70mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit San Juan?
The most sunshine in San Juan comes around June, averaging 12 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for San Juan?
Your packing list depends entirely on when you travel. Temperatures in San Juan swing from an average low of 22°C72°F in February up to 32°C90°F in June. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for San Juan?
San Juan gets rain on about 221 days out of the year. The wettest month is September. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in San Juan with Packola.
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