Air Quality in National City, United States

Cloudy
19.1°C · 73.5% humidity
19.1°
Feels 19.1°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
34 5pm
34
34
37 8pm
34
34
34 11pm
54
54
54 2am
54
54
54 5am
54
54
54 8am
54
54
54 11am
54
54
54 2pm
54
34
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.

73.5%
Humidity
32.9 km/h
Wind W
1010.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
37
8.83 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for National City?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.58.83 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (6 stations within 25 km)
8.83
Median
7.81
Average
6.46
Low
9.8
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -1.7

What is the 7-day forecast for National City?

06-09
21.2° 17.7°
06-10
20.9° 17.8°
06-11
20.4° 18.2°
06-12
20.6° 17.7°
06-13
22.3° 18.0°
06-14
20.3° 19.1°
06-15
20.1° 16.8°
0.38 mm
Both models agree Avg diff: 1.4°C

Where are air quality stations near National City?

50
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 12.0 µg/m³
34
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 8.2 µg/m³
4
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 1.0 µg/m³
28
Smythe Avenue
13.5 km PM2.5: 6.8 µg/m³
27
Ocean View Hills
13.8 km PM2.5: 6.5 µg/m³
28
International Border
16.1 km PM2.5: 6.8 µg/m³
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 10.3 µg/m³
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 10.3 µg/m³
41
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 9.8 µg/m³
33
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 7.9 µg/m³

What cities are near National City?

32 Chula Vista 40 San Diego 38 Coronado 36 Lemon Grove 34 La Presa 29 Imperial Beach 37 Spring Valley 37 La Mesa 39 Casa de Oro-Mount Helix 38 Rancho San Diego
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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.