Today | Weather | Sunday, September 20, 2026

Weather in El Monte, California

07:58 PM
Now
Cloudy Night
79° F
Feels Like 75°
Precipitation 0 %
Wind 6 mph
Humidity 58 %
Today
Partly Sunny with Showers
Day 82°
Night 66°
Precipitation 55 %
Wind 5 mph
UV Index (0 - 11+) 7

El Monte Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 20, 2025)
Cloudy Night

Day

88°

Night

64°

Wind

5 mph

Precipitation

0 %

Air Quality in El Monte

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.2 µg/m³
PM10 15.22 µg/m³
O3 0.052 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.12 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)
PM2.55.2 µg/m³
PM1015.22 µg/m³
O3102.53 µg/m³
NO20.34 µg/m³
SO20.47 µg/m³
CO132.88 µg/m³
NH30 µg/m³
NO0 µg/m³