Today | Weather | Monday, September 14, 2026

Weather in Downey, California

07:30 PM
Now
Sunny Weather
81° F
Feels Like 81°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 55 %
Today
Cloudy Weather
Day 86°
Night 68°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 7

Downey Weather Forecast Updated

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

Day

81°

Night

64°

Wind

5 mph

UV Index

70

Precipitation

0 %

Air Quality in Downey

NOW
52 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 9.41 µg/m³
PM10 26.97 µg/m³
O3 0.055 ppm
NO2 0.3 ppb
SO2 0.4 ppb
CO 0.16 ppm
NH3 0 µg/m³
NO 0.01 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.59.41 µg/m³
PM1026.97 µg/m³
O3107.52 µg/m³
NO20.62 µg/m³
SO21.01 µg/m³
CO184.62 µg/m³
NH30 µg/m³
NO0.01 µg/m³