Today | Weather | Monday, April 27, 2026

Weather in El Cajon, California

03:34 PM
Now
Cloudy Weather
70° F
Feels Like 72°
Precipitation 40 %
Wind 12 mph
UV Index (0 - 11+) 4
Humidity 45 %
Today
Partly Sunny with Showers
Day 70°
Night 48°
Precipitation 49 %
Wind 7 mph
UV Index (0 - 11+) 6

El Cajon Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Cloudy Weather

Day

66°

Night

54°

Wind

8 mph

UV Index

5

Precipitation

25 %

Air Quality in El Cajon

NOW
52 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.66 µg/m³
PM10 1.66 µg/m³
O3 0.055 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0.02 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.50.66 µg/m³
PM101.66 µg/m³
O3107.06 µg/m³
NO20.15 µg/m³
SO20.22 µg/m³
CO118.3 µg/m³
NH30 µg/m³
NO0.02 µg/m³