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National Weather Service Forecast for: San Juan, Puerto Rico  

Updated: 1:56 pm AST Sep 6, 2025 

Hazardous Weather Outlook
 

This
Afternoon
This Afternoon: Isolated showers. Mostly sunny, with a high near 91. Heat index values as high as 103. East wind around 14 mph. Chance of precipitation is 20%.
High: 91 °F		Tonight

Tonight: Scattered showers and thunderstorms before 9pm, then showers likely and possibly a thunderstorm between 9pm and 3am, then scattered showers after 3am. Cloudy, then becoming partly cloudy toward daybreak, with a low around 78. East wind around 8 mph. Chance of precipitation is 70%.
Low: 78 °F		Sunday

Sunday: Isolated showers before 9am, then showers likely and possibly a thunderstorm between 9am and noon, then scattered showers and thunderstorms after noon. Partly sunny, with a high near 91. Heat index values as high as 104. East southeast wind 7 to 16 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
High: 91 °F		Sunday
Night
Sunday Night: Scattered showers. Mostly cloudy, with a low around 78. East wind 6 to 8 mph. Chance of precipitation is 50%.
Low: 78 °F		Monday

Monday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 91. East wind 7 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
High: 91 °F		Monday
Night
Monday Night: Isolated showers before midnight. Mostly clear, with a low around 78. East southeast wind 6 to 8 mph. Chance of precipitation is 20%.
Low: 78 °F		Tuesday

Tuesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 92. East wind 5 to 15 mph. Chance of precipitation is 50%.
High: 92 °F		Tuesday
Night
Tuesday Night: Scattered showers. Mostly cloudy, with a low around 78. Southeast wind 3 to 8 mph. Chance of precipitation is 40%.
Low: 78 °F
Isolated
Showers

Showers
Likely

Showers
Likely

Scattered
Showers

Showers
Likely

Isolated
Showers then
Mostly Clear
Mostly Sunny
then
Scattered
Showers
Scattered
Showers

National Weather Service Forecast Details

 

 

 

MARIA

 

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