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° N Lon: 66° W Elev: 10 ft.

A Few Clouds

82°F

28°C

Humidity 79%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 3 Sep 12:56 am AST
Detailed forecast for

San Juan and Vicinity

Rest Of Tonight
Isolated thunderstorms late this evening. Variably cloudy with scattered showers. Lows around 82. Southeast winds 5 to 10 mph. Chance of rain 50 percent.
Wednesday
Variably cloudy with scattered showers in the morning, then mostly cloudy with numerous showers with isolated thunderstorms in the afternoon. Highs around 91. Temperature falling in the afternoon. Southeast winds 10 to 15 mph. Chance of rain 60 percent.
Wednesday Night
Partly cloudy with isolated showers in the evening, then variably cloudy with scattered showers with isolated thunderstorms after midnight. Lows around 82. Southeast winds 5 to 10 mph. Chance of rain 50 percent.
Thursday
Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers in the afternoon. Highs around 91. Temperature falling in the afternoon. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.
Thursday Night
Mostly clear in the evening, then partly cloudy with isolated showers after midnight. Lows around 82. East winds 5 to 10 mph. Chance of rain 20 percent.
Friday
Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers with isolated thunderstorms in the afternoon. Highs around 91. Temperature falling in the afternoon. Chance of rain 50 percent.
Friday Night
Variably cloudy with scattered showers. Lows around 82. Chance of rain 40 percent.
Saturday
Variably cloudy with scattered showers in the morning, then mostly cloudy with numerous showers with isolated thunderstorms in the afternoon. Highs around 91. Temperature falling in the afternoon. Chance of rain 70 percent.
Saturday Night
Variably cloudy with scattered showers. Lows around 82. Chance of rain 40 percent.
Sunday
Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers with isolated thunderstorms in the afternoon. Highs around 92. Temperature falling in the afternoon. Chance of rain 50 percent.
Sunday Night
Partly cloudy with isolated showers. Lows around 82. Chance of rain 20 percent.
Monday
Partly cloudy with isolated showers in the morning, then mostly cloudy with numerous showers with isolated thunderstorms in the afternoon. Highs around 90. Temperature falling in the afternoon. Chance of rain 70 percent.
Monday Night
Variably cloudy with scattered showers. Lows around 82. Chance of rain 50 percent.
Tuesday
Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers with isolated thunderstorms in the afternoon. Highs around 90. Temperature falling in the afternoon. Chance of rain 50 percent.



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1001 PM AST Tue Sep 2 2025
 
 

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