San Juan
Puerto Rico, USA
Long-term weather forecast
Long-term weather forecast
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March weather forecast and Climate
San Juan, PR

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An old fort building and a yonder view of the stunning San Juan city, Puerto Rico, with a clear view of the calm waterfront
An old fort building and a yonder view of the stunning San Juan city, Puerto Rico, with a clear view of the calm waterfront
  • The average high temperature in March: 84.9°F

Warmest months (with the highest average high temperature) are August and September (89.2°F).
The month with the lowest average high temperature is January (83.2°F).

  • The average low temperature in March: 72.9°F

The month with the highest average low temperature is August (78.2°F).
Coldest months (with the lowest average low temperature) are January and February (72°F).

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  • The average humidity in March: 71%

The month with the highest relative humidity is October (76.9%).
The month with the lowest relative humidity is March (71%).

  • The average rainfall in March: 3.1"

The wettest month (with the highest rainfall) is August (7.7").
The driest month (with the lowest rainfall) is March (3.1").

  • The average rainfall days in March: 12.2 days

Months with the highest number of rainy days are November and December (19.6 days).
The month with the lowest number of rainy days is March (12.2 days).

  • The 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).

  • The average daylight in March: 12h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, November and December (Average daylight: 11h).

  • The average sunshine in March: 9.1h

Months with most sunshine are March and July (Average sunshine: 9.1h).
The month with least sunshine is November (Average sunshine: 6.7h).

  • The average UV index in March: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
Months with the lowest UV index are January and December (UV index 8).

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