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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

84°F

29°C

Humidity 55%
Wind Speed E 17 G 25 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 17 Mar 10:56 am AST
Extended Forecast for

4 Miles S Jagual PR

  • Today

    Today: Scattered showers, mainly before 3pm. Mostly sunny, with a high near 78. East southeast wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 78 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers. Mostly cloudy, with a low around 67. East wind around 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers. Partly sunny, with a high near 78. East wind 10 to 13 mph. Chance of precipitation is 50%.

    High: 78 °F

    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Isolated showers before 9pm. Mostly clear, with a low around 67. East wind around 7 mph. Chance of precipitation is 10%.

    Low: 67 °F

    Isolated
    Showers then
    Clear

  • Thursday

    Thursday: Showers likely, mainly before noon. Mostly cloudy, with a high near 77. East southeast wind 8 to 11 mph. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Scattered showers. Partly cloudy, with a low around 67. East wind around 6 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Scattered
    Showers

  • Friday

    Friday: Showers likely, mainly before noon. Partly sunny, with a high near 78. South southeast wind 6 to 10 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: Scattered showers. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.

    Low: 66 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers. Partly sunny, with a high near 79. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 40%.

    High: 79 °F

    Scattered
    Showers

Detailed Forecast

Today
Scattered showers, mainly before 3pm. Mostly sunny, with a high near 78. East southeast wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tonight
Scattered showers. Mostly cloudy, with a low around 67. East wind around 8 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Scattered showers. Partly sunny, with a high near 78. East wind 10 to 13 mph. Chance of precipitation is 50%.
Wednesday Night
Isolated showers before 9pm. Mostly clear, with a low around 67. East wind around 7 mph. Chance of precipitation is 10%.
Thursday
Showers likely, mainly before noon. Mostly cloudy, with a high near 77. East southeast wind 8 to 11 mph. Chance of precipitation is 60%.
Thursday Night
Scattered showers. Partly cloudy, with a low around 67. East wind around 6 mph. Chance of precipitation is 30%.
Friday
Showers likely, mainly before noon. Partly sunny, with a high near 78. South southeast wind 6 to 10 mph. Chance of precipitation is 60%.
Friday Night
Scattered showers. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.
Saturday
Scattered showers. Partly sunny, with a high near 79. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 40%.
Saturday Night
Showers likely. Cloudy, with a low around 66. Chance of precipitation is 70%.
Sunday
Showers likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Sunday Night
Scattered showers. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Monday
Scattered showers. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Jagual PR
 18.1°N 65.99°W (Elev. 1004 ft)
Last Update:
2:56 am AST Mar 17, 2026
Forecast Valid:
11am AST Mar 17, 2026-6pm AST Mar 23, 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