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 >

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

83°F

28°C

Humidity 67%
Wind Speed E 15 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 21 Jan 2:56 pm AST
Extended Forecast for

Emajagua PR

  • This Afternoon

    This Afternoon: Scattered showers. Mostly sunny, with a high near 83. East northeast wind around 18 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 83 °F

    Scattered
    Showers

  • Tonight

    Tonight: Showers likely, mainly after 3am. Increasing clouds, with a low around 73. East northeast wind 15 to 17 mph. Chance of precipitation is 70%.

    Low: 73 °F

    Isolated
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 83. East wind 16 to 18 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 83 °F

    Scattered
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 73. East northeast wind 11 to 13 mph. Chance of precipitation is 70%.

    Low: 73 °F

    Showers
    Likely then
    Scattered
    Showers

  • Friday

    Friday: Showers likely, mainly before 9am. Partly sunny, with a high near 83. East northeast wind 13 to 15 mph. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Scattered showers. Partly cloudy, with a low around 74. East northeast wind 11 to 13 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers. Partly sunny, with a high near 83. East wind 11 to 13 mph. Chance of precipitation is 40%.

    High: 83 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers. Mostly cloudy, with a low around 74. East northeast wind around 14 mph. Chance of precipitation is 40%.

    Low: 74 °F

    Scattered
    Showers

  • Sunday

    Sunday: Sunny, with a high near 84. East wind 11 to 14 mph.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
Scattered showers. Mostly sunny, with a high near 83. East northeast wind around 18 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Tonight
Showers likely, mainly after 3am. Increasing clouds, with a low around 73. East northeast wind 15 to 17 mph. Chance of precipitation is 70%.
Thursday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 83. East wind 16 to 18 mph, with gusts as high as 23 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 73. East northeast wind 11 to 13 mph. Chance of precipitation is 70%.
Friday
Showers likely, mainly before 9am. Partly sunny, with a high near 83. East northeast wind 13 to 15 mph. Chance of precipitation is 60%.
Friday Night
Scattered showers. Partly cloudy, with a low around 74. East northeast wind 11 to 13 mph. Chance of precipitation is 30%.
Saturday
Scattered showers. Partly sunny, with a high near 83. East wind 11 to 13 mph. Chance of precipitation is 40%.
Saturday Night
Scattered showers. Mostly cloudy, with a low around 74. East northeast wind around 14 mph. Chance of precipitation is 40%.
Sunday
Sunny, with a high near 84. East wind 11 to 14 mph.
Sunday Night
Partly cloudy, with a low around 73.
Monday
Mostly sunny, with a high near 82.
Monday Night
Scattered showers. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Emajagua PR
 18°N 65.87°W (Elev. 0 ft)
Last Update:
9:23 am AST Jan 21, 2026
Forecast Valid:
3pm AST Jan 21, 2026-6pm AST Jan 27, 2026
 
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