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

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. 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

82°F

28°C

Humidity 65%
Wind Speed E 20 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Jan 3:56 pm AST
Extended Forecast for

Roosevelt Roads PR

  • This Afternoon

    This Afternoon: Scattered showers. Mostly sunny, with a high near 82. East northeast wind around 18 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 82 °F

    Scattered
    Showers

  • Tonight

    Tonight: Showers likely, mainly after 3am. Mostly cloudy, with a low around 80. East northeast wind around 18 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 80 °F

    Showers
    Likely

  • Thursday

    Thursday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 82. East wind 18 to 20 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 80. East wind around 14 mph. Chance of precipitation is 70%.

    Low: 80 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 82. East wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Scattered showers. Partly cloudy, with a low around 80. East wind around 13 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers. Partly sunny, with a high near 82. East wind 11 to 14 mph. Chance of precipitation is 40%.

    High: 82 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers. Mostly cloudy, with a low around 80. East wind 11 to 14 mph. Chance of precipitation is 40%.

    Low: 80 °F

    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers, mainly after noon. Mostly sunny, with a high near 82. East wind around 14 mph. Chance of precipitation is 30%.

    High: 82 °F

    Mostly Sunny
    then
    Scattered
    Showers

Detailed Forecast

This Afternoon
Scattered showers. Mostly sunny, with a high near 82. East northeast wind around 18 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Tonight
Showers likely, mainly after 3am. Mostly cloudy, with a low around 80. East northeast wind around 18 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Thursday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 82. East wind 18 to 20 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 80. East wind around 14 mph. Chance of precipitation is 70%.
Friday
Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 82. East wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Friday Night
Scattered showers. Partly cloudy, with a low around 80. East wind around 13 mph. Chance of precipitation is 30%.
Saturday
Scattered showers. Partly sunny, with a high near 82. East wind 11 to 14 mph. Chance of precipitation is 40%.
Saturday Night
Scattered showers. Mostly cloudy, with a low around 80. East wind 11 to 14 mph. Chance of precipitation is 40%.
Sunday
Scattered showers, mainly after noon. Mostly sunny, with a high near 82. East wind around 14 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 80.
Monday
Mostly sunny, with a high near 82.
Monday Night
Scattered showers. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 80.
Wednesday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roosevelt Roads PR
 18.23°N 65.62°W (Elev. 0 ft)
Last Update:
4:14 pm AST Jan 21, 2026
Forecast Valid:
4pm AST Jan 21, 2026-6pm AST Jan 28, 2026
 
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