Today | Weather | Wednesday, February 25, 2026

Weather in El Cajon, California

11:48 PM
Now
Cloudy Night
55° F
Feels Like 55°
Precipitation 0 %
Wind 5 mph
Humidity 90 %
Today
Cloudy Weather
Day 84°
Night 55°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5

El Cajon Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 25, 2025)
Sunny Weather

Day

81°

Night

46°

Wind

4 mph

UV Index

5

Precipitation

0 %

Air Quality in El Cajon

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.11 µg/m³
PM10 10.86 µg/m³
O3 0.037 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.10 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)
PM2.54.11 µg/m³
PM1010.86 µg/m³
O372.39 µg/m³
NO20.55 µg/m³
SO20.36 µg/m³
CO113.34 µg/m³
NH30 µg/m³
NO0 µg/m³