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Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Mostly Cloudy

81°F

27°C

Humidity 77%
Wind Speed Calm
Barometer 29.97 in (1014.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Oct 5:56 pm AST
Extended Forecast for

San Isidro PR

  • Tonight

    Tonight: Showers and thunderstorms likely before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 75. Southeast wind 5 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 75 °F

    Showers
    Likely

  • Monday

    Monday: Scattered showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 91. East wind 6 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    High: 91 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 75. East southeast wind 6 to 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 75 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 93. East wind 7 to 13 mph. Chance of precipitation is 40%.

    High: 93 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Scattered showers, mainly before midnight. Partly cloudy, with a low around 76. East wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 89. East southeast wind 10 to 14 mph. Chance of precipitation is 50%.

    High: 89 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers. Mostly cloudy, with a low around 75. East southeast wind 6 to 9 mph. Chance of precipitation is 50%.

    Low: 75 °F

    Scattered
    Showers

  • Thursday

    Thursday: Showers likely, mainly after noon. Mostly cloudy, with a high near 93. East wind 8 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 93 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Scattered showers. Mostly cloudy, with a low around 76. East wind around 9 mph. Chance of precipitation is 40%.

    Low: 76 °F

    Scattered
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 75. Southeast wind 5 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Scattered showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 91. East wind 6 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 75. East southeast wind 6 to 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 93. East wind 7 to 13 mph. Chance of precipitation is 40%.
Tuesday Night
Scattered showers, mainly before midnight. Partly cloudy, with a low around 76. East wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday
Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 89. East southeast wind 10 to 14 mph. Chance of precipitation is 50%.
Wednesday Night
Scattered showers. Mostly cloudy, with a low around 75. East southeast wind 6 to 9 mph. Chance of precipitation is 50%.
Thursday
Showers likely, mainly after noon. Mostly cloudy, with a high near 93. East wind 8 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 76. East wind around 9 mph. Chance of precipitation is 40%.
Friday
Scattered showers, mainly after noon. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 75.
Saturday
Scattered showers. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Mostly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Isidro PR
 18.39°N 65.89°W (Elev. 46 ft)
Last Update:
3:41 pm AST Oct 4, 2026
Forecast Valid:
6pm AST Oct 4, 2026-6pm AST Oct 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation