Today | Weather | Monday, September 14, 2026

Weather in Norwalk, California

07:27 AM
Now
Cloudy Weather
70° F
Feels Like 70°
Precipitation 49 %
Wind 4 mph
UV Index (0 - 11+) 0
Humidity 86 %
Today
Cloudy Weather
Day 84°
Night 68°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 6

Norwalk Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Cloudy Weather

Day

82°

Night

64°

Wind

5 mph

UV Index

70

Precipitation

0 %

Air Quality in Norwalk

NOW
37 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.59 µg/m³
PM10 23.72 µg/m³
O3 0.040 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.16 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)
PM2.55.59 µg/m³
PM1023.72 µg/m³
O379.23 µg/m³
NO20.57 µg/m³
SO20.78 µg/m³
CO177.86 µg/m³
NH30 µg/m³
NO0 µg/m³