What is the air quality in San Carlos today?

The current Air Quality Index (AQI) in San Carlos is 17 (Good). PM2.5 concentration is 4.06 µg/m³.

What is the temperature in San Carlos right now?

The current temperature in San Carlos is 17.5°C (feels like 17.5°C). Humidity is 71.8% and wind speed is 51.9 km/h.

Is it safe to go outside in San Carlos?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in San Carlos, United States

Windy

17.5°C · 71.8% humidity

17.5°

Feels 17.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

23 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

46h · 100 stn

View full history →

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.

71.8%

Humidity

51.9 km/h

Wind W

1014.8 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.06 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for San Carlos?

Temperature & Precipitation

PM2.5 Trend

46h · 100 stations

PM2.54.06 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (23 stations within 25 km)

4.06

Median

4.26

Average

3.48

Low

6.18

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +1.7

What is the 7-day forecast for San Carlos?

10-20

22.3° 12.4°

10-21

22.8° 12.8°

0.13 mm

10-22

24.0° 12.5°

10-23

20.9° 13.2°

10-24

21.3° 12.6°

10-25

21.8° 12.5°

3.25 mm

10-26

20.9° 12.6°

Both models agree Avg diff: 2.7°C

Where are air quality stations near San Carlos?

Emerald Hills

5.9 km PM2.5: 3.8 µg/m³

Berkeley-Palo Alto

11.6 km PM2.5: 3.5 µg/m³

Acterra!

16.2 km PM2.5: 4.1 µg/m³

Belle Air School

18.2 km PM2.5: 4.0 µg/m³

Garden Ave Residence

18.2 km PM2.5: 4.2 µg/m³

Parkside Intermediate School

18.5 km PM2.5: 4.2 µg/m³

San Bruno School District Office

18.8 km PM2.5: 4.1 µg/m³

San Bruno City Hall

18.8 km PM2.5: 4.2 µg/m³

7th & Walnut Park

19.0 km PM2.5: 4.3 µg/m³

Forest Lane Park

19.6 km PM2.5: 4.5 µg/m³

What cities are near San Carlos?

17 Belmont 16 Redwood City 18 Foster City 18 San Mateo 15 Menlo Park 15 East Palo Alto 18 Burlingame 15 Palo Alto 18 Millbrae 16 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 2026-10-20T21:46 UTC.