San Juan Weather Today
Puerto Rico · Thursday, March 12, 2026
Real-time Air Quality Index (AQI)
San Juan Weather & Air Quality Overview
San Juan is a city in Puerto Rico, located in the Northern Hemisphere at coordinates 18.47°N, 66.11°W. With a population of approximately 2.3 million, it is one of the notable urban centers in Americas. San Juan experiences a tropical climate. This page provides real-time temperature, humidity, wind speed, UV index, air quality monitoring, and a detailed 10-day weather forecast for San Juan, Puerto Rico.
Right now in San Juan, the temperature is 23°C (feels like 26°C) with partly cloudy. Humidity is at 87%. Winds are blowing at 11 km/h. Today's high is expected to reach 27°C and the low will be around 23°C.
The current Air Quality Index (AQI) in San Juan is 8, rated as Good. The dominant pollutant is O3.
- Today's high in San Juan: 27°C
- Humidity in San Juan: 87%
- Current AQI in San Juan: 8 (Good)
- Wind in San Juan: 11 km/h
Weather in San Juan and the San Juan forecast are updated every few minutes. For more cities, see our weather directory and global AQI map, or check city AQI rankings and weather guides.
Data updates every few minutes. Weather powered by Open-Meteo. Air quality from multiple monitoring networks.