Air Quality in National City, United States

Windy
18.3°C · 73.7% humidity
18.3°
Feels 18.3°
26
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
27 10pm
25
1
28 1am
28
28
28 4am
28
53
53 7am
53
53
53 10am
53
53
53 1pm
53
53
28 4pm
28
28
28 7pm
15
15
Station readings
27
25
1
CAMS model adj -22
50
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
75
75
50
50
50
50
37
37
AD 728×90

PM2.5 Trend (24h)

27h · 1 station
73.7%
Humidity
61.2 km/h
Wind W
1011.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for National City?

Temperature & Precipitation

PM2.56.27 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (3 stations within 25 km)
6.27
Median
6.24
Average
6.0
Low
6.44
High
PM2.5 µg/m³ · Model: 7.4 · Bias: +1.1

What is the 7-day forecast for National City?

04-10
18.3° 16.8°
9.25 mm
04-11
17.2° 15.4°
24.12 mm
04-12
16.8° 14.2°
2.19 mm
04-13
15.1° 14.8°
0.5 mm
04-14
18.5° 15.1°
0.06 mm
04-15
19.8° 17.5°
04-16
21.2° 17.6°
Both models agree Avg diff: 1.7°C

Where are air quality stations near National City?

26
Smythe Avenue
13.5 km PM2.5: 6.2 µg/m³
24
Ocean View Hills
13.8 km PM2.5: 5.8 µg/m³
26
International Border
16.1 km PM2.5: 6.2 µg/m³
28
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km
28
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km
30
El Cajon-Redwood Avenue, San Diego, California
19.3 km
27
El Cajon-Redwood Avenue, San Diego, California
19.3 km
29
La Mesa
23.1 km PM2.5: 6.9 µg/m³
26
CRSF (EHS Bldg)
25.2 km PM2.5: 6.2 µg/m³

What cities are near National City?

26 Chula Vista 26 San Diego 26 Coronado 26 Lemon Grove 26 La Presa 26 Imperial Beach 26 Spring Valley 26 La Mesa 26 Casa de Oro-Mount Helix 26 Rancho San Diego

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T01:02 UTC.