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

Hot Temperatures in the Northwest U.S.; Excessive Rainfall Potential in the Southwest U.S.

Hot to extremely hot daytime temperatures remain in place across coastal southern California and the interior Northwest, with the Northwest carrying the potential for record-breaking high temperatures. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. this week. 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

81°F

27°C

Humidity 85%
Wind Speed SE 3 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 3 Sep 3:56 am AST
Extended Forecast for

2 Miles WNW Lomas PR

Heat Advisory September 3, 10:00am until September 3, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Scattered showers. Mostly cloudy, with a low around 72. Light east southeast wind. Chance of precipitation is 40%.

    Low: 72 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then scattered showers and thunderstorms after 3pm. Partly sunny, with a high near 86. East southeast wind 7 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 86 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Scattered showers, mainly before 3am. Partly cloudy, with a low around 71. East southeast wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 71 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers, mainly after 3pm. Increasing clouds, with a high near 83. East southeast wind 7 to 11 mph. Chance of precipitation is 40%.

    High: 83 °F

    Sunny then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Scattered showers after midnight. Mostly clear, with a low around 73. East southeast wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Clear then
    Scattered
    Showers

  • Friday

    Friday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 85. East wind 7 to 13 mph. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Scattered showers. Mostly cloudy, with a low around 72. East wind around 6 mph. Chance of precipitation is 40%.

    Low: 72 °F

    Scattered
    Showers

  • Saturday

    Saturday: Showers likely, mainly after noon. Partly sunny, with a high near 84. East wind 7 to 13 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Scattered showers. Partly cloudy, with a low around 71. East wind 3 to 6 mph. Chance of precipitation is 40%.

    Low: 71 °F

    Scattered
    Showers

Detailed Forecast

Overnight
Scattered showers. Mostly cloudy, with a low around 72. Light east southeast wind. Chance of precipitation is 40%.
Wednesday
Scattered showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then scattered showers and thunderstorms after 3pm. Partly sunny, with a high near 86. East southeast wind 7 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Scattered showers, mainly before 3am. Partly cloudy, with a low around 71. East southeast wind 5 to 7 mph. Chance of precipitation is 40%.
Thursday
Scattered showers, mainly after 3pm. Increasing clouds, with a high near 83. East southeast wind 7 to 11 mph. Chance of precipitation is 40%.
Thursday Night
Scattered showers after midnight. Mostly clear, with a low around 73. East southeast wind 3 to 6 mph. Chance of precipitation is 30%.
Friday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 85. East wind 7 to 13 mph. Chance of precipitation is 60%.
Friday Night
Scattered showers. Mostly cloudy, with a low around 72. East wind around 6 mph. Chance of precipitation is 40%.
Saturday
Showers likely, mainly after noon. Partly sunny, with a high near 84. East wind 7 to 13 mph. Chance of precipitation is 60%.
Saturday Night
Scattered showers. Partly cloudy, with a low around 71. East wind 3 to 6 mph. Chance of precipitation is 40%.
Sunday
Showers likely, mainly after noon. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Sunday Night
Scattered showers. Partly cloudy, with a low around 72. Chance of precipitation is 40%.
Monday
Showers likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Monday Night
Scattered showers. Partly cloudy, with a low around 70. Chance of precipitation is 50%.
Tuesday
Showers likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Lomas PR
 18.28°N 65.93°W (Elev. 1220 ft)
Last Update:
3:51 am AST Sep 3, 2025
Forecast Valid:
4am AST Sep 3, 2025-6pm AST Sep 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