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

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

80°F

27°C

Humidity 85%
Wind Speed Calm
Barometer 29.95 in (1014.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 19 Sep 2:56 am AST
Extended Forecast for

Levittown PR

Heat Advisory September 19, 10:00am until September 19, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Isolated showers. Partly cloudy, with a low around 80. East southeast wind around 6 mph. Chance of precipitation is 20%.

    Low: 80 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers before 9am, then scattered showers after noon. Mostly sunny, with a high near 91. Heat index values as high as 109. East northeast wind 6 to 16 mph. Chance of precipitation is 30%.

    High: 91 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers, mainly after 3am. Partly cloudy, with a low around 79. East wind 5 to 9 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 91. Heat index values as high as 109. East wind 6 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 91 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Scattered showers. Mostly cloudy, with a low around 79. Southeast wind 5 to 8 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Scattered
    Showers

  • Monday

    Monday: Isolated showers, then scattered showers and thunderstorms after noon. Partly sunny, with a high near 92. East wind 6 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 92 °F

    Isolated
    Showers then
    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers, mainly before midnight. Mostly cloudy, with a low around 79. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Scattered
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 8 to 16 mph. Chance of precipitation is 40%.

    High: 91 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Tuesday Night

    Tuesday Night: Clear, with a low around 79. East southeast wind 6 to 10 mph.

    Low: 79 °F

    Clear

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 80. East southeast wind around 6 mph. Chance of precipitation is 20%.
Saturday
Isolated showers before 9am, then scattered showers after noon. Mostly sunny, with a high near 91. Heat index values as high as 109. East northeast wind 6 to 16 mph. Chance of precipitation is 30%.
Saturday Night
Scattered showers, mainly after 3am. Partly cloudy, with a low around 79. East wind 5 to 9 mph. Chance of precipitation is 30%.
Sunday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 91. Heat index values as high as 109. East wind 6 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
Scattered showers. Mostly cloudy, with a low around 79. Southeast wind 5 to 8 mph. Chance of precipitation is 40%.
Monday
Isolated showers, then scattered showers and thunderstorms after noon. Partly sunny, with a high near 92. East wind 6 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Monday Night
Scattered showers, mainly before midnight. Mostly cloudy, with a low around 79. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.
Tuesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 91. East wind 8 to 16 mph. Chance of precipitation is 40%.
Tuesday Night
Clear, with a low around 79. East southeast wind 6 to 10 mph.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Partly cloudy, with a low around 79.
Thursday
Scattered showers. Partly sunny, with a high near 92. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 79.
Friday
Scattered showers. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Levittown PR
 18.45°N 66.17°W (Elev. 3 ft)
Last Update:
2:48 am AST Sep 19, 2026
Forecast Valid:
3am AST Sep 19, 2026-6pm AST Sep 25, 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