Today | Weather | Tuesday, April 7, 2026

Weather in El Cajon, California

08:48 AM
Now
Cloudy Weather
64° F
Feels Like 70°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 2
Humidity 70 %
Today
Cloudy Weather
Day 81°
Night 54°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

El Cajon Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)
Cloudy Weather

Day

81°

Night

48°

Wind

4 mph

UV Index

9

Precipitation

0 %

Air Quality in El Cajon

NOW
56 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.44 µg/m³
PM10 21.43 µg/m³
O3 0.056 ppm
NO2 0.2 ppb
SO2 0.4 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.03 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)
PM2.56.44 µg/m³
PM1021.43 µg/m³
O3109.86 µg/m³
NO20.4 µg/m³
SO21.09 µg/m³
CO123.32 µg/m³
NH30 µg/m³
NO0.03 µg/m³