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

Severe Weather and Flash Flooding From the Upper Midwest to Mid-Atlantic; Heat Continues in the Central and Southeast U.S.

Scattered severe thunderstorms are expected tonight across parts of the Upper Midwest to western Great Lakes. Additional severe storms will also be possible in parts of the northern Plains, central Appalachians, and Mid-Atlantic. Extreme heat is expected to intensify across much of the Southeast and Tennessee Valley, continuing through much of 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.

Partly Cloudy

79°F

26°C

Humidity 90%
Wind Speed Calm
Barometer 30.06 in (1017.8 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 27 Jul 10:56 pm AST
Extended Forecast for

San Juan PRSimilar City Names

  • Tonight

    Tonight: Scattered showers. Mostly cloudy, with a low around 78. East southeast wind around 7 mph. Chance of precipitation is 40%.

    Low: 78 °F

    Scattered
    Showers

  • Monday

    Monday: 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 91. Heat index values as high as 108. East wind 7 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 91 °F

    Scattered
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Scattered showers. Partly cloudy, with a low around 78. Southeast wind 5 to 9 mph. Chance of precipitation is 30%.

    Low: 78 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Scattered showers, mainly before noon. Mostly sunny, with a high near 90. Heat index values as high as 103. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 90 °F

    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Isolated showers. Partly cloudy, with a low around 77. East southeast wind 7 to 9 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Isolated
    Showers

  • Wednesday

    Wednesday: Isolated showers. Mostly sunny, with a high near 90. East northeast wind 9 to 14 mph. Chance of precipitation is 10%.

    High: 90 °F

    Isolated
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers. Partly cloudy, with a low around 77. East southeast wind around 8 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 8 to 13 mph. Chance of precipitation is 40%.

    High: 91 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 78. East southeast wind around 9 mph.

    Low: 78 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers. Mostly cloudy, with a low around 78. East southeast wind around 7 mph. Chance of precipitation is 40%.
Monday
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 91. Heat index values as high as 108. East wind 7 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Scattered showers. Partly cloudy, with a low around 78. Southeast wind 5 to 9 mph. Chance of precipitation is 30%.
Tuesday
Scattered showers, mainly before noon. Mostly sunny, with a high near 90. Heat index values as high as 103. East wind 9 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday Night
Isolated showers. Partly cloudy, with a low around 77. East southeast wind 7 to 9 mph. Chance of precipitation is 20%.
Wednesday
Isolated showers. Mostly sunny, with a high near 90. East northeast wind 9 to 14 mph. Chance of precipitation is 10%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 77. East southeast wind around 8 mph. Chance of precipitation is 30%.
Thursday
Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 8 to 13 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 78. East southeast wind around 9 mph.
Friday
Scattered showers, mainly before noon. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Friday Night
Scattered showers. Mostly cloudy, with a low around 78. Chance of precipitation is 50%.
Saturday
Scattered showers. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Saturday Night
Scattered showers. Mostly cloudy, with a low around 78. Chance of precipitation is 50%.
Sunday
Showers likely. Mostly cloudy, with a high near 90. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
San Juan PRSimilar City Names
 18.41°N 66.07°W (Elev. 56 ft)
Last Update:
4:03 pm AST Jul 27, 2025
Forecast Valid:
11pm AST Jul 27, 2025-6pm AST Aug 3, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation