Air Quality in Union City, United States

Windy
34.1°C · 39.8% humidity
34.1°
Feels 34.1°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
13 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
12 11am
10
10
25 2pm
21
18
15 5pm
14
13
14 8pm
20
20
20 11pm
20
12
10 2am
10
10
10 5am
10
10
10 8am
12
12
Station readings 26h ago
AQI 10
PM2.5 2.5 µg/m³ · 26h ago
AD 728×90

Air Quality Index Trend

45h · 9 stn

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

39.8%
Humidity
51.2 km/h
Wind WSW
1014.8 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
25
5.95 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

45h · 9 stations
PM2.55.95 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX10.9
Extreme
AD 300×250
5.95
Median
5.72
Average
0.7
Low
12.1
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +0.3
09-05
34.1° 16.8°
1.81 mm
09-06
23.8° 19.9°
3.69 mm
09-07
21.9° 19.0°
09-08
26.7° 19.9°
1.0 mm
09-09
26.0° 14.5°
0.06 mm
09-10
27.6° 18.1°
9.94 mm
09-11
33.1° 15.8°
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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 2026-09-05T18:58 UTC.