What is the air quality in Redwood City today?

The current Air Quality Index (AQI) in Redwood City is 20 (Good). PM2.5 concentration is 4.89 µg/m³.

What is the temperature in Redwood City right now?

The current temperature in Redwood City is 20.8°C (feels like 20.8°C). Humidity is 45.2% and wind speed is 23.6 km/h.

Is it safe to go outside in Redwood City?

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

Air Quality in Redwood City, United States

Clear

20.8°C · 45.2% humidity

20.8°

Feels 20.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

23 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 103 stn

View full history →

Redwood 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.

45.2%

Humidity

23.6 km/h

Wind NW

1018.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.89 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Redwood City?

Temperature & Precipitation

PM2.5 Trend

45h · 103 stations

PM2.54.89 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (23 stations within 25 km)

4.89

Median

4.4

Average

3.02

Low

6.35

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +0.9

What is the 7-day forecast for Redwood City?

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 Redwood City?

Redwood City, San Mateo, California

2.9 km PM2.5: 5.8 µg/m³

Emerald Hills

4.4 km PM2.5: 3.7 µg/m³

Berkeley-Palo Alto

8.6 km PM2.5: 3.6 µg/m³

Acterra!

13.2 km PM2.5: 4.3 µg/m³

Belle Air School

21.4 km PM2.5: 4.1 µg/m³

Garden Ave Residence

21.5 km PM2.5: 4.2 µg/m³

Parkside Intermediate School

21.7 km PM2.5: 4.2 µg/m³

San Bruno School District Office

22.0 km PM2.5: 4.1 µg/m³

San Bruno City Hall

22.1 km PM2.5: 4.3 µg/m³

7th & Walnut Park

22.2 km PM2.5: 4.5 µg/m³

What cities are near Redwood City?

19 San Carlos 19 Belmont 18 Menlo Park 16 East Palo Alto 19 Foster City 16 Palo Alto 19 San Mateo 18 Los Altos 19 Burlingame 18 Mountain View

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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 2026-10-20T20:06 UTC.