Air Quality in San Juan, United States

Windy
27.0°C · 82.3% humidity
27.0°
Feels 27.0°
51
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast
27 7pm
34
27
51 10pm
44
39
36 1am
33
32
30 4am
29
29
28 7am
28
28
34 10am
34
34
34 1pm
54
34
34 4pm
34
34
AD 728×90

Air Quality Index Trend

46h · 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.

82.3%
Humidity
65.4 km/h
Wind SE
1011.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
51
12.16 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for San Juan?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station
PM2.512.16 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (2 stations within 25 km)
12.16
Median
12.15
Average
12.1
Low
12.2
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -4.8

What is the 7-day forecast for San Juan?

06-09
36.4° 22.1°
0.19 mm
06-10
36.4° 25.5°
06-11
34.8° 25.5°
0.5 mm
06-12
35.6° 24.6°
06-13
34.8° 24.9°
0.13 mm
06-14
36.2° 24.0°
06-15
36.6° 25.6°
Both models agree Avg diff: 1.5°C

Where are air quality stations near San Juan?

51
Edinburg East Freddy Gonzalez Drive
11.1 km PM2.5: 12.2 µg/m³
42
Mission, Harlingen, Texas
14.2 km PM2.5: 10.1 µg/m³
51
Mission, Harlingen, Texas
14.2 km PM2.5: 12.1 µg/m³

What cities are near San Juan?

51 Pharr 51 Alamo 51 McAllen 51 Donna 51 Edinburg 51 Weslaco 51 Mission 51 Reynosa 40 Ciudad Río Bravo 42 Mercedes
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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 2026-06-09T03:14 UTC.