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

Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. 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

73°F

23°C

Humidity 87%
Wind Speed Calm
Barometer 29.95 in (1014.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 31 Jan 5:56 am AST
Extended Forecast for

Loiza PR

  • Overnight

    Overnight: Isolated showers. Partly cloudy, with a low around 74. East southeast wind around 10 mph. Chance of precipitation is 10%.

    Low: 74 °F

    Isolated
    Showers

  • Saturday

    Saturday: Scattered showers before noon, then scattered showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 84. East southeast wind 10 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 75. Southeast wind 8 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 75 °F

    Showers

  • Sunday

    Sunday: Scattered showers, mainly after noon. Mostly sunny, with a high near 85. South southeast wind 8 to 13 mph. Chance of precipitation is 30%.

    High: 85 °F

    Scattered
    Showers

  • Sunday Night

    Sunday Night: Isolated showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 73. South southwest wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 73 °F

    Isolated
    Showers then
    Showers
    Likely

  • Monday

    Monday: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph becoming north 12 to 17 mph in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely. Cloudy, with a low around 72. North wind 17 to 20 mph. Chance of precipitation is 70%.

    Low: 72 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 78. North northeast wind 17 to 20 mph. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely. Cloudy, with a low around 72. Northeast wind around 17 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 72 °F

    Showers
    Likely

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 74. East southeast wind around 10 mph. Chance of precipitation is 10%.
Saturday
Scattered showers before noon, then scattered showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 84. East southeast wind 10 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 75. Southeast wind 8 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Scattered showers, mainly after noon. Mostly sunny, with a high near 85. South southeast wind 8 to 13 mph. Chance of precipitation is 30%.
Sunday Night
Isolated showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 73. South southwest wind 5 to 7 mph. Chance of precipitation is 60%.
Monday
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph becoming north 12 to 17 mph in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Monday Night
Showers likely. Cloudy, with a low around 72. North wind 17 to 20 mph. Chance of precipitation is 70%.
Tuesday
Showers likely. Cloudy, with a high near 78. North northeast wind 17 to 20 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Cloudy, with a low around 72. Northeast wind around 17 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Wednesday
Showers likely. Cloudy, with a high near 79. Chance of precipitation is 70%.
Wednesday Night
Showers likely. Cloudy, with a low around 72. Chance of precipitation is 70%.
Thursday
Scattered showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Friday
Scattered showers. Partly sunny, with a high near 83. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Loiza PR
 18.44°N 65.89°W (Elev. 3 ft)
Last Update:
4:29 pm AST Jan 30, 2026
Forecast Valid:
5am AST Jan 31, 2026-6pm AST Feb 6, 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