National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall and Severe Thunderstorms Threaten the Southern U.S. Again Thursday

A Moderate Risk (Level 3 of 4) Excessive Rainfall Outlook and Flood Watches have been issued for portions of east Texas into Louisiana Thursday where flash, urban, and riverine flooding is possible. A Slight Risk (Level 2 of 5) for scattered severe thunderstorms has been issued from west Texas to the lower Mississippi Valley Thursday afternoon into Thursday night. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

88°F

31°C

Humidity 66%
Wind Speed E 15 G 25 mph
Barometer 29.90 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 16 May 3:56 pm AST
Extended Forecast for

Guaynabo PR

  • This Afternoon

    This Afternoon: Isolated showers. Mostly sunny, with a high near 90. East northeast wind around 10 mph. Chance of precipitation is 20%.

    High: 90 °F

    Isolated
    Showers

  • Tonight

    Tonight: Scattered showers, mainly between midnight and 3am. Partly cloudy, with a low around 77. Southeast wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Scattered
    Showers

  • Friday

    Friday: Isolated showers. Sunny, with a high near 91. Heat index values as high as 104. East southeast wind 6 to 11 mph. Chance of precipitation is 20%.

    High: 91 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Isolated showers before midnight. Mostly clear, with a low around 77. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Isolated
    Showers then
    Clear

  • Saturday

    Saturday: Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 6 to 11 mph. Chance of precipitation is 40%.

    High: 91 °F

    Isolated
    Showers then
    Scattered
    Showers

  • Saturday Night

    Saturday Night: Isolated showers. Mostly clear, with a low around 77. East southeast wind 5 to 7 mph. Chance of precipitation is 10%.

    Low: 77 °F

    Isolated
    Showers

  • Sunday

    Sunday: Scattered showers, mainly after noon. Mostly sunny, with a high near 90. East wind 6 to 13 mph. Chance of precipitation is 50%.

    High: 90 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. East southeast wind around 6 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Scattered showers, mainly before noon. Mostly sunny, with a high near 91. East wind 6 to 10 mph. Chance of precipitation is 30%.

    High: 91 °F

    Scattered
    Showers then
    Sunny

Detailed Forecast

This Afternoon
Isolated showers. Mostly sunny, with a high near 90. East northeast wind around 10 mph. Chance of precipitation is 20%.
Tonight
Scattered showers, mainly between midnight and 3am. Partly cloudy, with a low around 77. Southeast wind 5 to 7 mph. Chance of precipitation is 30%.
Friday
Isolated showers. Sunny, with a high near 91. Heat index values as high as 104. East southeast wind 6 to 11 mph. Chance of precipitation is 20%.
Friday Night
Isolated showers before midnight. Mostly clear, with a low around 77. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.
Saturday
Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 6 to 11 mph. Chance of precipitation is 40%.
Saturday Night
Isolated showers. Mostly clear, with a low around 77. East southeast wind 5 to 7 mph. Chance of precipitation is 10%.
Sunday
Scattered showers, mainly after noon. Mostly sunny, with a high near 90. East wind 6 to 13 mph. Chance of precipitation is 50%.
Sunday Night
Mostly clear, with a low around 76. East southeast wind around 6 mph.
Monday
Scattered showers, mainly before noon. Mostly sunny, with a high near 91. East wind 6 to 10 mph. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Scattered showers. Mostly sunny, with a high near 87. Chance of precipitation is 50%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 74. Chance of precipitation is 50%.
Thursday
Showers likely. Partly sunny, with a high near 86.
Click Map For Forecast
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.37°N 66.11°W (Elev. 115 ft)
Last Update:
4:38 pm AST May 16, 2024
Forecast Valid:
4pm AST May 16, 2024-6pm AST May 23, 2024
 
Forecast Discussion
 
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Additional Resources

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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