March weather forecast
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 also a moderately hot month in San Juan, Puerto Rico, with an average temperature varying between 79.9°F (26.6°C) and 73.9°F (23.3°C).

Temperature

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

Humidity

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

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, 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 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.

Daylight

In March, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 6:43 am and sunset at 6:30 pm. On the last day of March, sunrise is at 6:19 am and sunset at 6:37 pm AST.

Sunshine

The average sunshine in March 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, Puerto Rico. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in March interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What are the coldest months 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, Puerto Rico.

What is the least humid month in San Juan?

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

What is the average humidity in March in San Juan?

The average relative humidity in March in San Juan, Puerto Rico, is 76%.

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

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

What months are the ocean coldest in San Juan?

February and March, with an average ocean temperature of 79°F (26.1°C), are months with the coldest seawater.

What is the water temperature in March in San Juan?

In March, the average ocean temperature in San Juan, Puerto Rico, is 79°F (26.1°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

The average day length in March in San Juan is 12h and 3min.

What time are sunrise and sunset in March in San Juan?

On the first day of March in San Juan, Puerto Rico, sunrise is at 6:43 am and sunset at 6:30 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 6:37 pm AST.

How long on average sun shines in March in San Juan?

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

What is the month with the lowest UV index in San Juan?

The months with the lowest UV index are January through March and December, with an average maximum UV index of 6.

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

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 threat from unsafe exposure to 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).
The months with the lowest average high temperature are January and March (79.9°F).

  • Average low temperature in March: 73.9°F

The 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"Hg

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

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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%

The months with the highest relative humidity are May, June and July (79%).
The 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: 12h and 3min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 2min).

  • Average sunshine in March: 8h and 36min

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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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

The months with the highest UV index are April, May, June, July, August, September, October and November (UV index 7).
The 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

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

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