Air Quality in National City, United States

Cloudy
17.4°C · 75.0% humidity
17.4°
Feels 17.4°
29
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast
54 4am
54
54
29 7am
30
31
32 10am
33
33
33 1pm
34
34
34 4pm
34
27
27 7pm
27
27
27 10pm
27
27
34 1am
34
54
AD 728×90

Air Quality Index Trend

48h · 1 stn

National 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. Current PM2.5 concentration in National City is 1.4× the WHO annual guideline of 5 µg/m³.

75.0%
Humidity
22.4 km/h
Wind SW
1011.4 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
29
7.0 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.57.0 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
7.0
Median
5.1
Average
3.69
Low
8.4
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +0.3
05-29
22.0° 17.4°
05-30
17.8° 16.4°
05-31
20.5° 18.7°
06-01
21.0° 17.5°
06-02
21.3° 16.2°
06-03
20.7° 15.6°
06-04
19.8° 17.1°
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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 2026-05-29T14:29 UTC.