Air Quality in National City, United States

Windy
20.3°C · 71.3% humidity
20.3°
Feels 20.3°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
34 2pm
34
34
27 5pm
15
20
24 8pm
27
29
30 11pm
31
52
53 2am
53
53
54 5am
54
34
34 8am
34
34
34 11am
34
34
AD 728×90

Air Quality Index Trend

46h · 3 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 1.3× the WHO annual guideline of 5 µg/m³.

71.3%
Humidity
53.5 km/h
Wind W
1012.6 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
27
6.37 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for National City?

Temperature & Precipitation

PM2.5 Trend

46h · 3 stations
PM2.56.37 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (2 stations within 25 km)
6.37
Median
7.4
Average
6.2
Low
8.6
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +3.4

What is the 7-day forecast for National City?

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°
Both models agree Avg diff: 1.7°C

Where are air quality stations near National City?

47
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 11.3 µg/m³
79
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 25.4 µg/m³
39
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 9.4 µg/m³
17
Smythe Avenue
13.5 km PM2.5: 4.0 µg/m³
16
Ocean View Hills
13.8 km PM2.5: 3.8 µg/m³
17
International Border
16.1 km PM2.5: 4.0 µg/m³
33
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 7.9 µg/m³
29
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 7.0 µg/m³
58
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 15.4 µg/m³
72
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 22.1 µg/m³

What cities are near National City?

28 Chula Vista 26 San Diego 26 Coronado 28 Lemon Grove 30 La Presa 30 Imperial Beach 43 Spring Valley 28 La Mesa 52 Casa de Oro-Mount Helix 54 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 2026-05-29T00:27 UTC.