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Thunderstorms and Heavy Rainfall in the Mid-Atlantic; Fire Weather Concerns in the West

Thunderstorms are expected to bring heavy rain and potential significant flash and urban flooding to the Mid-Atlantic on Thursday, especially along the I-95 urban corridor. Dry conditions, gusty winds, and isolated dry thunderstorms will continue to bring a critical fire weather threat to the northwestern Great Basin into the interior Northwest through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

79°F

26°C

Humidity 79%
Wind Speed S 3 mph
Barometer 30.03 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 31 Jul 4:56 am AST
Extended Forecast for

Luis Muñoz Marín International Airport PR

Heat Advisory July 31, 10:00am until July 31, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Isolated showers. Partly cloudy, with a low around 78. East wind around 8 mph. Chance of precipitation is 10%.

    Low: 78 °F

    Isolated
    Showers

  • Thursday

    Thursday: Scattered showers, mainly before 3pm. Mostly sunny, with a high near 91. Heat index values as high as 103. East wind 11 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 91 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly between midnight and 3am. Mostly cloudy, with a low around 79. East southeast wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 79 °F

    Showers
    Likely

  • Friday

    Friday: Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 91. Heat index values as high as 105. East wind 13 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 91 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 60%.

    Low: 79 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before noon, then scattered showers. Mostly cloudy, with a high near 91. East wind 9 to 14 mph. Chance of precipitation is 70%.

    High: 91 °F

    Showers
    Likely then
    Scattered
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 78. Southeast wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 78 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly after noon. Partly sunny, with a high near 91. East southeast wind 7 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 91 °F

    Scattered
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely. Cloudy, with a low around 79. East southeast wind around 10 mph. Chance of precipitation is 70%.

    Low: 79 °F

    Showers
    Likely

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 78. East wind around 8 mph. Chance of precipitation is 10%.
Thursday
Scattered showers, mainly before 3pm. Mostly sunny, with a high near 91. Heat index values as high as 103. East wind 11 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Thursday Night
Showers likely, mainly between midnight and 3am. Mostly cloudy, with a low around 79. East southeast wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 91. Heat index values as high as 105. East wind 13 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Friday Night
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before noon, then scattered showers. Mostly cloudy, with a high near 91. East wind 9 to 14 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 78. Southeast wind 6 to 8 mph. Chance of precipitation is 60%.
Sunday
Showers likely, mainly after noon. Partly sunny, with a high near 91. East southeast wind 7 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Sunday Night
Showers likely. Cloudy, with a low around 79. East southeast wind around 10 mph. Chance of precipitation is 70%.
Monday
Showers. High near 91. Chance of precipitation is 80%.
Monday Night
Showers. Low around 80. Chance of precipitation is 80%.
Tuesday
Scattered showers. Partly sunny, with a high near 90. Chance of precipitation is 50%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.
Wednesday
Showers likely. Partly sunny, with a high near 91. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Luis Muñoz Marín International Airport PR
 18.44°N 66.02°W (Elev. 7 ft)
Last Update:
4:13 am AST Jul 31, 2025
Forecast Valid:
5am AST Jul 31, 2025-6pm AST Aug 6, 2025
 
Forecast Discussion
 
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