Today | Weather | Sunday, October 25, 2026

Weather in Downey, California

12:14 AM
Now
Night
64° F
Feels Like 64°
Precipitation 0 %
Wind 4 mph
Humidity 80 %
Today
Cloudy Weather
Day 82°
Night 57°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 4

Downey Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 25, 2025)
Cloudy Night

Day

72°

Night

57°

Wind

4 mph

Precipitation

0 %

Air Quality in Downey

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 8.19 µg/m³
PM10 14.87 µg/m³
O3 0.052 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.13 ppm
NH3 0.05 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)
PM2.5 – 8.19 µg/m³
PM10 – 14.87 µg/m³
O3 – 101.57 µg/m³
NO2 – 0.49 µg/m³
SO2 – 0.5 µg/m³
CO – 153.12 µg/m³
NH3 – 0.05 µg/m³
NO – 0 µg/m³