Air Quality in San Carlos, United States

Windy
25.5°C · 36.1% humidity
25.5°
Feels 25.5°
29
Good
Air quality is satisfactory. Enjoy outdoor activities.
21 stations

Nearby Monitoring Stations

AQI Forecast
27 12pm
27
27
29 3pm
34
34
34 6pm
34
34
34 9pm
34
34
34 12am
34
34
34 3am
34
34
27 6am
27
27
27 9am
27
27
AD 728×90

Air Quality Index Trend

47h · 1 stn

San Carlos's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

36.1%
Humidity
49.0 km/h
Wind WNW
1007.2 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
29
6.88 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for San Carlos?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.56.88 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (21 stations within 25 km)
6.88
Median
6.46
Average
4.87
Low
10.58
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -0.4

What is the 7-day forecast for San Carlos?

07-21
25.0° 11.5°
07-22
25.5° 14.2°
07-23
22.5° 16.4°
07-24
29.3° 12.6°
07-25
22.5° 14.3°
07-26
27.7° 11.8°
07-27
25.0° 12.1°
Both models agree Avg diff: 2.6°C

Where are air quality stations near San Carlos?

70
Redwood City, San Mateo, California
5.7 km PM2.5: 21.1 µg/m³
57
Redwood City, San Mateo, California
5.7 km PM2.5: 15.0 µg/m³
24
Emerald Hills
5.9 km PM2.5: 5.8 µg/m³
23
Berkeley-Palo Alto
11.6 km PM2.5: 5.4 µg/m³
26
Acterra!
16.2 km PM2.5: 6.2 µg/m³
26
Belle Air School
18.2 km PM2.5: 6.3 µg/m³
29
Garden Ave Residence
18.2 km PM2.5: 7.0 µg/m³
25
Parkside Intermediate School
18.5 km PM2.5: 6.1 µg/m³
28
Parkside Intermediate School (redeployment)
18.5 km PM2.5: 6.6 µg/m³
25
San Bruno School District Office
18.7 km PM2.5: 5.9 µg/m³

What cities are near San Carlos?

28 Belmont 31 Redwood City 28 Foster City 28 San Mateo 28 Menlo Park 24 East Palo Alto 27 Burlingame 23 Palo Alto 27 Millbrae 25 Los Altos
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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 2026-07-21T22:18 UTC.