Today | Weather | Sunday, March 15, 2026

Weather in El Cajon, California

01:49 PM
Now
Sunny Weather
79° F
Feels Like 82°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 6
Humidity 39 %
Today
Cloudy Weather
Day 79°
Night 52°
Precipitation 25 %
Wind 5 mph
UV Index (0 - 11+) 6

El Cajon Weather Forecast Updated

7 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 15, 2025)
Cloudy Weather

Day

64°

Night

43°

Wind

4 mph

UV Index

4

Precipitation

2 %

Air Quality in El Cajon

NOW
49 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 11.8 µg/m³
PM10 24.26 µg/m³
O3 0.051 ppm
NO2 0.2 ppb
SO2 0.3 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.06 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)
PM2.511.8 µg/m³
PM1024.26 µg/m³
O3100.56 µg/m³
NO20.33 µg/m³
SO20.79 µg/m³
CO128.39 µg/m³
NH30 µg/m³
NO0.06 µg/m³