| NWS Forecast for: Northwest Issued by: National Weather Service San Juan, PR Last Update: 243 AM AST Sun Sep 20 2026 | |
Today: Partly cloudy this morning, then cloudy with showers with isolated thunderstorms this afternoon. Highs around 91. East winds 5 to 10 mph. Chance of rain 90 percent. Tonight: Mostly cloudy with numerous showers with isolated thunderstorms in the evening, then partly cloudy after midnight. Lows around 83. Southeast winds around 5 mph. Chance of rain 70 percent. Monday: Partly cloudy in the morning, then cloudy with showers with isolated thunderstorms in the afternoon. Highs around 92. Temperature falling in the afternoon. East winds 5 to 10 mph. Chance of rain 90 percent. Monday Night: Cloudy with numerous showers with isolated thunderstorms in the evening, then partly cloudy after midnight. Lows around 83. Southeast winds around 5 mph. Chance of rain 70 percent. Tuesday: Partly cloudy in the morning, then variably cloudy with scattered showers with isolated thunderstorms in the afternoon. Highs around 92. East winds 5 to 10 mph. Chance of rain 50 percent. Tuesday Night: Variably cloudy with scattered showers with isolated thunderstorms in the evening, then partly cloudy after midnight. Lows around 83. Chance of rain 50 percent. Wednesday: Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers in the afternoon. Highs around 92. Chance of rain 40 percent. Wednesday Night: Partly cloudy with isolated showers. Lows around 83. Chance of rain less than 20 percent. Thursday: Partly cloudy with isolated showers in the morning, then cloudy with numerous showers with isolated thunderstorms in the afternoon. Highs around 92. Temperature falling in the afternoon. Chance of rain 70 percent. Thursday Night: Partly cloudy with isolated showers. Lows around 83. Chance of rain less than 20 percent. Friday: Sunny in the morning, then mostly cloudy with numerous showers with isolated thunderstorms in the afternoon. Highs around 92. Temperature falling in the afternoon. Chance of rain 70 percent. Friday Night: Partly cloudy with isolated showers. Lows around 83. Chance of rain 20 percent. Saturday: Partly cloudy with isolated showers in the morning, then variably cloudy with scattered showers in the afternoon. Highs around 92. Temperature falling in the afternoon. Chance of rain 50 percent. | |
| Zone Forecast: Northwest | |
Visit your local NWS office at: https://www.weather.gov/sju |