San Juan set a new daily rainfall record for October 4, with 1.87 inches of precipitation recorded at Luis Muñoz Marín International Airport, according to the National Weather Service (NWS). This surpasses the previous record of 1.31 inches, established in 1937, which had stood for 89 years.
The new record was set during a day of rain showers and thunderstorms that affected various parts of Puerto Rico in the afternoon. The record specifically corresponds to the highest amount of rainfall recorded in San Juan for October 4.