March weather forecastSan Juan, PR
March
Weather in March
March in San Juan welcomes the onset of spring with a rise in temperatures. Noticeably, the month endures the highest amount of rainfall days at 12.8, registering a total of 0.87" (22mm) of rainfall. The sea temperature marginally rises to 79.1°F (26.2°C) in line with an increase in sunshine hours to 8.6 per day. Winds remain subtly tranquil albeit slightly more humid. These conditions make for a pleasant weather transition into the warmer months.Temperature
San Juan's temperatures tend to hit their minimum during 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.Rainfall
In San Juan, during March, the rain falls for 12.8 days and regularly aggregates up to 0.87" (22mm) of precipitation. In San Juan, during the entire year, the rain falls for 159.9 days and collects up to 12.01" (305mm) of precipitation.Ocean temperature
February and March, with an average ocean temperature of 79°F (26.1°C), are months with the coldest seawater.Note: Water activities including swimming and diving are pleasurable in temperatures between 77°F (25°C) and 84.2°F (29°C), ensuring comfort and enjoyment for extended time frames.
Daylight
The average length of the day in March is 12h and 3min.On the first day of the month, sunrise is at 6:42 am and sunset at 6:30 pm. On the last day of March, in San Juan, sunrise is at 6:18 am and sunset at 6:38 pm AST.
Sunshine
In March, the average sunshine 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. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In March, a daily UV index of 6 turns into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Heads up! UV intensity is amplified by reflections from water and sand.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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).
Average daylight in March /
Average sunshine in March
San Juan, PR
- Average daylight in March: 12h and 6min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- 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).
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).
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).
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).
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).
