March weather forecast and climate
San Juan, PR

An old fort building and a view of the stunning San Juan city, Puerto Rico
An old fort building and a view of the stunning San Juan city, Puerto Rico

Weather in March

The first month of the spring, March, is still a warm month in San Juan, Puerto Rico, with average temperature varying between 73.9°F (23.3°C) and 79.9°F (26.6°C).

Temperature

January and March, with an average high-temperature of 79.9°F (26.6°C), are the coldest months.

Humidity

February and March, with an average relative humidity of 76%, are the least humid months.

Rainfall

In San Juan, during March, the rain falls for 12.8 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, in San Juan, there are 159.9 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

Ocean temperature

February and March, with an average ocean temperature of 79°F (26.1°C), are months with the coldest seawater.
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In March, the average length of the day in San Juan is 12.1h.

Sunshine

The average sunshine in San Juan, Puerto Rico, is 8.6h.

UV index

January through March and December, with an average maximum UV index of 6, are months with the lowest UV index in San Juan. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 in March transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in San Juan?

January and March, with an average high-temperature of 79.9°F (26.6°C), are the coldest months in San Juan.

What is the temperature in March in San Juan?

In March, in San Juan, Puerto Rico, the average high-temperature is 79.9°F (26.6°C), and the average low-temperature is 73.9°F (23.3°C).

What are the least humid months in San Juan?

February and March, with an average relative humidity of 76%, are the least humid months in San Juan.

What is the average humidity in March in San Juan?

The average relative humidity in March is 76%.

How many days does it rain in March in San Juan?

In San Juan, in March, during 12.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

What are the months with the coldest ocean in San Juan?

Months with the coldest seawater in San Juan, Puerto Rico, are February and March, with an average ocean temperature of 79°F (26.1°C).

How warm is the water in March in San Juan?

In San Juan, Puerto Rico, the average seawater temperature in March is 79°F (26.1°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in March in San Juan?

In March, the average length of the day in San Juan is 12.1h.

How many hours of sunshine does San Juan have in March?

In March, the average sunshine is 8.6h.

What are the months with the lowest UV index in San Juan?

January through March and December, with an average maximum UV index of 6, are months with the lowest UV index in San Juan, Puerto Rico.

What is the UV index reading in March in San Juan?

The average daily maximum UV index in March is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in March
San Juan, PR

Average temperature in March - San Juan, PR
  • Average high temperature in March: 79.9°F

The warmest month (with the highest average high temperature) is August (85.1°F).
Months with the lowest average high temperature are January and March (79.9°F).

  • Average low temperature in March: 73.9°F

Months with the highest average low temperature are August, September and October (79.2°F).
The coldest month (with the lowest average low temperature) is March (73.9°F).

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Average pressure in March
San Juan, PR

Average pressure in March - San Juan, PR
  • Average pressure in March: 30.01"

Months with the highest atmospheric pressure are January and February (30.02").
The month with the lowest atmospheric pressure is October (29.9").

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Average wind speed in March
San Juan, PR

Average wind speed in March - San Juan, PR
  • Average wind speed in March: 9.6mph

The windiest month (with the highest average wind speed) is July (10.7mph).
The calmest month (with the lowest average wind speed) is October (7.4mph).

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Average humidity in March
San Juan, PR

Average humidity in March - San Juan, PR
  • Average humidity in March: 76%

Months with the highest relative humidity are May, June and July (79%).
Months with the lowest relative humidity are February and March (76%).

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Average rainfall in March
San Juan, PR

Average rainfall in March - San Juan, PR
  • Average rainfall in March: 0.87"

The wettest month (with the highest rainfall) is November (1.57").
The driest month (with the least rainfall) is April (0.55").

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Average rainfall days in March
San Juan, PR

Average rainfall days in March - San Juan, PR
  • Average rainfall days in March: 12.8 days

The month with the highest number of rainy days is November (16.1 days).
The month with the least rainy days is June (10.3 days).

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Average sea temperature in March
San Juan, PR

Average sea temperature in March - San Juan, PR
  • Average sea temperature in March: 79.1°F

The best month for swimming (with the highest average sea temperature) is September (84.9°F).
The coldest month (with the lowest average sea temperature) is February (78.9°F).

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Average daylight in March /
Average sunshine in March
San Juan, PR

Average daylight in March / Average sunshine in March - San Juan, PR
  • Average daylight in March: 12.1h

The month with the longest days is June (Average daylight: 13.2h).
The month with the shortest days is December (Average daylight: 11h).

  • Average sunshine in March: 8.6h

The month with the most sunshine is June (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in March
San Juan, PR

Average sunshine days in March - San Juan, PR
  • Average sunshine days in March: 11.9 days

The month with the most sunshine days is June (13.7 days).
The month with the least sunshine days is November (9.4 days).

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Average UV index in March
San Juan, PR

Average UV index in March - San Juan, PR
  • Average UV index in March: 6

Months with the highest UV index are April, May, June, July, August, September, October and November (UV index 7).
Months with the lowest UV index are January, February, March and December (UV index 6).

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Average cloud cover in March
San Juan, PR

Average cloud cover in March - San Juan, PR
  • Average cloud cover in March: 31

The month with the most cloud cover is December (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 26).

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Average visibility in March
San Juan, PR

Average visibility in March - San Juan, PR
  • Average visibility in March: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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