Air Quality in National City, United States

Windy
26.4°C · 48.0% humidity
26.4°
Feels 26.4°
52
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
9 stations

Nearby Monitoring Stations

AQI Forecast
— 10am
—
—
— 1pm
—
—
— 4pm
—
—
— 7pm
—
—
— 10pm
—
—
— 1am
—
—
— 4am
—
—
— 7am
—
—

Air Quality Index Trend

46h · 8 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.

48.0%
Humidity
44.7 km/h
Wind NW
1015.2 hPa
Pressure
0.0
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
52
12.38 µg/m³
PM10
51
54.9 µg/m³
050100150200300500

What is the weather forecast for National City?

Temperature & Precipitation

PM2.5 Trend

46h · 8 stations
PM2.512.38 µg/m³ ✓ WHO
Moderate
PM1054.9 µg/m³
Moderate
UV INDEX0.0
Low
Station readings (9 stations within 25 km)
12.38
Median
14.29
Average
11.25
Low
24.9
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +1.1

What is the 7-day forecast for National City?

10-20
26.4° 21.7°
10-21
23.4° 20.3°
10-22
24.7° 20.9°
10-23
22.5° 20.3°
10-24
22.3° 19.2°
0.19 mm
10-25
27.0° 18.4°
10-26
23.7° 20.1°
Both models agree Avg diff: 3.4°C

Where are air quality stations near National City?

45
Southwest Chula Vista
5.4 km PM2.5: 10.9 µg/m³
47
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 11.3 µg/m³
87
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 29.2 µg/m³
50
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 12.0 µg/m³
40
Smythe Avenue
13.5 km PM2.5: 9.6 µg/m³
45
Ocean View Hills
13.8 km PM2.5: 10.7 µg/m³
50
International Border
16.1 km PM2.5: 11.9 µg/m³
78
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 24.9 µg/m³
55
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 14.0 µg/m³
95
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 33.0 µg/m³

What cities are near National City?

53 Chula Vista 50 San Diego 50 Coronado 54 Lemon Grove 56 La Presa 53 Imperial Beach 56 Spring Valley 55 La Mesa 58 Casa de Oro-Mount Helix 58 Rancho San Diego
Get AQI alerts for National City

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T20:58 UTC.