Average high temperature and rainfall in San Juan during March. © Scott S. Bateman

San Juan weather in March offers a nearly ideal combination of warm temperatures and low chance of rain.

This historical city in Puerto Rico is a common port of call for eastern Caribbean cruises. It also is a common embarkation point for some eastern and southern Caribbean cruises.

It is widely known for shopping, dining, architecture and especially the historical site of Old San Juan, which lies near the cruise terminals.

Rainfall in March

March is an appealing weather month for San Juan because it is part of a brief dry season each year.

San Juan has an average rainfall of 2.4 inches in March, according to the U.S. National Weather Service. It is a low point of the year along with the cooler February.

By comparison, rainfall climbs to four inches in April and keeps climbing until it reaches a high point of six inches in October and November.

It rains on average about eight days in San Juan during March, according to the U.S. National Weather Service. That’s much better than the 13 to 14 days it rains each month from July through December.

San Juan Temperatures in March

San Juan’s daytime temperatures stay in a fairly tight range throughout the year between the lower and upper 80s Fahrenheit or mid to high 20s Celsius.

In March, the average high temperature in San Juan is 84 degrees Fahrenheit or 29 Celsius, according to the U.S. National Weather Service. The average low, which occurs mostly at night, is 72 degrees Fahrenheit or 22 Celsius.

These moderate temperatures are comfortable for land activities throughout the day. But the nighttime temperatures are cool enough that water is chilly at times for swimmers, especially in the mornings. Trade winds and chilly northern currents also may cool the water.

Even though there is a beach close to the cruise terminal, cruise visitors are more likely to go to Old San Juan anyway.

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