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

Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. 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

84°F

29°C

Humidity 74%
Wind Speed E 15 mph
Barometer 30.07 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 3 Nov 9:56 am AST
Extended Forecast for

Guaynabo PR

  • Today

    Today: Scattered showers. Partly sunny, with a high near 87. East wind 13 to 15 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    High: 87 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after 9pm. Partly cloudy, with a low around 77. East wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 88. East northeast wind 5 to 11 mph. Chance of precipitation is 40%.

    High: 88 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Isolated showers. Partly cloudy, with a low around 76. East wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 76 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Isolated showers after noon. Sunny, with a high near 87. East wind 5 to 11 mph. Chance of precipitation is 20%.

    High: 87 °F

    Sunny then
    Isolated
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers. Partly cloudy, with a low around 75. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East wind 7 to 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph.

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: Scattered showers. Mostly sunny, with a high near 88. East wind 6 to 13 mph. Chance of precipitation is 30%.

    High: 88 °F

    Scattered
    Showers

Detailed Forecast

Today
Scattered showers. Partly sunny, with a high near 87. East wind 13 to 15 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Scattered showers, mainly after 9pm. Partly cloudy, with a low around 77. East wind 3 to 6 mph. Chance of precipitation is 30%.
Tuesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 88. East northeast wind 5 to 11 mph. Chance of precipitation is 40%.
Tuesday Night
Isolated showers. Partly cloudy, with a low around 76. East wind around 6 mph becoming calm after midnight. Chance of precipitation is 20%.
Wednesday
Isolated showers after noon. Sunny, with a high near 87. East wind 5 to 11 mph. Chance of precipitation is 20%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 75. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday
Scattered showers, mainly before noon. Mostly sunny, with a high near 88. East wind 7 to 10 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph.
Friday
Scattered showers. Mostly sunny, with a high near 88. East wind 6 to 13 mph. Chance of precipitation is 30%.
Friday Night
Clear, with a low around 76.
Saturday
Scattered showers. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 76.
Sunday
Scattered showers. Partly sunny, with a high near 89. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guaynabo PR
 18.39°N 66.11°W (Elev. 151 ft)
Last Update:
4:35 am AST Nov 3, 2025
Forecast Valid:
10am AST Nov 3, 2025-6pm AST Nov 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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