Air Quality in National City, United States

Windy
22.8°C · 65.1% humidity
22.8°
Feels 22.8°
34
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations

Nearby Monitoring Stations

AQI Forecast
54 12pm
54
54
34 3pm
20
24
27 6pm
29
30
31 9pm
32
33
33 12am
33
33
34 3am
34
34
54 6am
54
34
34 9am
54
54
AD 728×90

Air Quality Index Trend

47h · 6 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.

65.1%
Humidity
51.9 km/h
Wind WNW
1006.8 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
34
8.18 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for National City?

Temperature & Precipitation

PM2.5 Trend

47h · 6 stations
PM2.58.18 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (7 stations within 25 km)
8.18
Median
9.27
Average
7.09
Low
18.3
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +1.8

What is the 7-day forecast for National City?

07-21
24.1° 21.5°
07-22
22.8° 21.2°
07-23
23.0° 21.1°
0.13 mm
07-24
24.7° 20.8°
07-25
24.5° 21.1°
07-26
24.1° 20.1°
07-27
23.6° 21.7°
Both models agree Avg diff: 1.9°C

Where are air quality stations near National City?

42
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 10.1 µg/m³
62
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 17.3 µg/m³
59
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 15.9 µg/m³
30
Smythe Avenue
13.5 km PM2.5: 7.3 µg/m³
28
Ocean View Hills
13.8 km PM2.5: 6.8 µg/m³
29
International Border
16.1 km PM2.5: 6.9 µg/m³
30
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 7.2 µg/m³
25
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 6.0 µg/m³
40
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 9.6 µg/m³
51
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 12.1 µg/m³

What cities are near National City?

33 Chula Vista 32 San Diego 32 Coronado 44 Lemon Grove 43 La Presa 31 Imperial Beach 48 Spring Valley 48 La Mesa 53 Casa de Oro-Mount Helix 52 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 2026-07-21T22:38 UTC.