Today | Weather | Tuesday, January 13, 2026

Weather in El Cajon, California

12:28 PM
Now
Sunny Weather
72° F
Feels Like 73°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3
Humidity 23 %
Today
Sunny Weather
Day 79°
Night 43°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

El Cajon Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (January 13, 2025)
Cloudy Weather

Day

70°

Night

36°

Wind

7 mph

UV Index

3

Precipitation

0 %

Air Quality in El Cajon

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

Pollutant Concentrations:

PM2.5 11.12 µg/m³
PM10 19.59 µg/m³
O3 0.045 ppm
NO2 1.1 ppb
SO2 0.3 ppb
CO 0.21 ppm
NH3 0.21 µg/m³
NO 0.42 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)
PM2.511.12 µg/m³
PM1019.59 µg/m³
O388.02 µg/m³
NO22.1 µg/m³
SO20.9 µg/m³
CO244.72 µg/m³
NH30.21 µg/m³
NO0.42 µg/m³