Today | Weather | Sunday, October 19, 2025

Weather in El Cajon, California

06:17 AM
Now
Cloudy Night
52° F
Feels Like 54°
Precipitation 0 %
Wind 4 mph
Humidity 48 %
Today
Cloudy Weather
Day 88°
Night 52°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

El Cajon Weather Forecast Updated

51 minutes ago
Last updated on

Air Quality in El Cajon

NOW
60 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 16.56 µg/m³
PM10 23.7 µg/m³
O3 0.042 ppm
NO2 0.7 ppb
SO2 0.2 ppb
CO 0.13 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 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)
PM2.516.56 µg/m³
PM1023.7 µg/m³
O382.76 µg/m³
NO21.36 µg/m³
SO20.65 µg/m³
CO153.22 µg/m³
NH30 µg/m³
NO0 µg/m³