Today | Weather | Wednesday, January 7, 2026

Weather in Redwood City, California

07:51 PM
Now
Cloudy Night
52° F
Feels Like 46°
Precipitation 7 %
Wind 10 mph
Humidity 79 %
Today
Cloudy Weather
Day 61°
Night 46°
Precipitation 25 %
Wind 9 mph
UV Index (0 - 11+) 3

Redwood City Weather Forecast Updated

Last updated on

Air Quality in Redwood City

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.78 µg/m³
PM10 10.45 µg/m³
O3 0.045 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.52.78 µg/m³
PM1010.45 µg/m³
O388.86 µg/m³
NO20.41 µg/m³
SO20.31 µg/m³
CO122.3 µg/m³
NH30 µg/m³
NO0 µg/m³