Air Quality in National City, United States

Windy
18.8°C · 78.1% humidity
18.8°
Feels 18.8°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
63 3pm
63
60
51 6pm
42
42
42 9pm
42
42
42 12am
42
42
42 3am
42
42
67 6am
67
67
67 9am
67
67
67 12pm
67
67
Station readings
63
63
60
51
CAMS model adj -8
75
75
50
50
50
50
50
50
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
75
AD 728×90

PM2.5 Trend (24h)

28h · 1 station
78.1%
Humidity
43.8 km/h
Wind W
1014.2 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for National City?

Temperature & Precipitation

PM2.519.98 µg/m³ ×1.3 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (3 stations within 25 km)
19.98
Median
20.1
Average
19.76
Low
20.55
High
PM2.5 µg/m³ · Model: 4.4 · Bias: -15.6

What is the 7-day forecast for National City?

04-09
19.3° 17.6°
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°
Both models agree Avg diff: 1.4°C

Where are air quality stations near National City?

64
San Diego - Sherman Elementary School, San Diego, California
5.4 km
50
San Diego - Sherman Elementary School, San Diego, California
5.4 km
65
Smythe Avenue
13.5 km PM2.5: 18.6 µg/m³
67
Ocean View Hills
13.8 km PM2.5: 19.5 µg/m³
65
International Border
16.1 km PM2.5: 18.7 µg/m³
45
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km
106
Otay Mesa - Donovan Correctional Facility, San Diego, California
19.3 km
67
El Cajon-Redwood Avenue, San Diego, California
19.3 km
74
La Mesa
23.1 km PM2.5: 22.9 µg/m³
61
CRSF (EHS Bldg)
25.2 km PM2.5: 17.0 µg/m³

What cities are near National City?

68 Chula Vista 67 San Diego 67 Coronado 67 Lemon Grove 68 La Presa 68 Imperial Beach 68 Spring Valley 67 La Mesa 68 Casa de Oro-Mount Helix 68 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 2026-04-09T18:40 UTC.