Air Quality in San Juan, United States

Windy
25.0°C · 94.3% humidity
25.0°
Feels 25.0°
12
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
27 6am
27
34
12 9am
11
16
19 12pm
21
23
24 3pm
25
25
26 6pm
26
24
25 9pm
25
25
25 12am
25
25
25 3am
25
25
AD 728×90

Air Quality Index Trend

44h · 1 stn

San Juan's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

94.3%
Humidity
47.2 km/h
Wind SE
1009.7 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
12
2.76 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

44h · 1 station
PM2.52.76 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
2.76
Median
3.2
Average
1.4
Low
5.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +4.6
05-29
33.8° 24.1°
0.81 mm
05-30
31.9° 23.1°
0.06 mm
05-31
33.3° 22.4°
0.06 mm
06-01
36.1° 23.8°
06-02
33.5° 23.5°
06-03
33.6° 23.9°
06-04
33.4° 23.9°
0.13 mm
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T14:28 UTC.