Today | Weather | Thursday, February 5, 2026

Weather in El Cajon, California

05:34 PM
Now
Cloudy Night
64° F
Feels Like 63°
Precipitation 0 %
Wind 6 mph
Humidity 51 %
Today
Cloudy Weather
Day 79°
Night 52°
Precipitation 25 %
Wind 5 mph
UV Index (0 - 11+) 4

El Cajon Weather Forecast Updated

28 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 5, 2025)
Cloudy Weather

Day

72°

Night

54°

Wind

6 mph

UV Index

1

Precipitation

3 %

Air Quality in El Cajon

NOW
107 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 38.09 µg/m³
PM10 66.58 µg/m³
O3 0.058 ppm
NO2 0.4 ppb
SO2 0.2 ppb
CO 0.19 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.538.09 µg/m³
PM1066.58 µg/m³
O3114.14 µg/m³
NO20.68 µg/m³
SO20.52 µg/m³
CO214.34 µg/m³
NH30 µg/m³
NO0 µg/m³