Air Quality in National City, United States

Windy
25.0°C · 77.3% humidity
25.0°
Feels 25.0°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
66 9am
66
66
37 12pm
45
51
55 3pm
58
61
50 6pm
51
64
53 9pm
53
53
53 12am
54
54
54 3am
54
54
54 6am
54
54
AD 728×90

Air Quality Index Trend

45h · 9 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.

77.3%
Humidity
48.3 km/h
Wind WNW
1015.9 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
37
8.82 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for National City?

Temperature & Precipitation

PM2.5 Trend

45h · 9 stations
PM2.58.82 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (6 stations within 25 km)
8.82
Median
11.47
Average
6.7
Low
15.4
High
PM2.5 µg/m³ · Model: 13.7 · Bias: +4.9

What is the 7-day forecast for National City?

09-05
25.0° 21.9°
09-06
25.9° 21.3°
1.44 mm
09-07
24.5° 22.8°
09-08
25.0° 20.0°
0.25 mm
09-09
26.2° 20.8°
09-10
24.8° 19.5°
0.31 mm
09-11
27.4° 21.1°
Both models agree Avg diff: 2.9°C

Where are air quality stations near National City?

39
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 9.4 µg/m³
40
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 9.6 µg/m³
28
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 6.7 µg/m³
41
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 9.8 µg/m³
35
San Diego - Sherman Elementary School, San Diego, California
5.4 km PM2.5: 8.4 µg/m³
45
Smythe Avenue
13.5 km PM2.5: 10.9 µg/m³
54
Ocean View Hills
13.8 km PM2.5: 13.4 µg/m³
56
International Border
16.1 km PM2.5: 14.3 µg/m³
58
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 15.4 µg/m³
140
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km PM2.5: 51.3 µg/m³

What cities are near National City?

47 Chula Vista 29 San Diego 32 Coronado 39 Lemon Grove 44 La Presa 51 Imperial Beach 40 Spring Valley 38 La Mesa 36 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 2026-09-05T19:46 UTC.