Capital city, Puerto Rico

San Juan weather by month and the best time to visit

Updated October 2026Sources

Dec–MayBest time to visit

When to go to San Juan

Dec–May is drier and a bit cooler, and busiest in Dec–Mar. Jun–Nov is hot and humid, with hurricane risk Aug–Oct.

San Juan weather by month

Average daily high, rainfall and conditions.

Jan28°51 mm
Feb28°45 mm
Mar28°61 mm
Apr29°76 mm
May30°129 mm
Jun30°90 mm
Jul30°100 mm
Aug30°130 mm
Sep30°162 mm
Oct30°161 mm
Nov28°137 mm
Dec28°64 mm

PleasantHotRainyCool or coldBest months

Average highAverage lowRainfall

Monthly averages

Month	High	Low	Rain	Humidity	Conditions
January	28°C82°F	23°C74°F	51 mm	77%	Pleasant
February	28°C82°F	23°C74°F	45 mm	74%	Pleasant
March	28°C83°F	23°C74°F	61 mm	73%	Pleasant
April	29°C85°F	24°C76°F	76 mm	74%	Pleasant
May	30°C85°F	25°C77°F	129 mm	77%	Pleasant
June	30°C86°F	26°C79°F	90 mm	79%	Pleasant
July	30°C86°F	26°C79°F	100 mm	79%	Pleasant
August	30°C87°F	27°C80°F	130 mm	79%	Pleasant
September	30°C86°F	27°C80°F	162 mm	79%	Rainy
October	30°C85°F	26°C79°F	161 mm	80%	Rainy
November	28°C83°F	25°C78°F	137 mm	80%	Pleasant
December	28°C82°F	24°C76°F	64 mm	79%	Pleasant

Best months across Puerto Rico

Place	Best months	Warmest month
San Juan	Dec–May	Aug (30°C)
Rincón	Nov–Apr	Aug (30°C)
Vieques	Dec–May	Sep (30°C)

Quick answers

What is the best month to visit San Juan?

Dec–May. Dec–May is drier and a bit cooler, and busiest in Dec–Mar. Jun–Nov is hot and humid, with hurricane risk Aug–Oct.

When is the rainy season in San Juan?

Rain peaks in September with about 162 mm. Months with 150 mm or more: Sep–Oct.

What is the hottest month in San Juan?

August, with average highs of 30°C (87°F).

How cold does San Juan get?

The coolest nights are in February, averaging 23°C (74°F).

More about San Juan

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Sources

Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.