Today | Weather | Saturday, August 23, 2025

Heat Advisory (Issued when high temperatures and humidity create conditions that may be hazardous during outdoor activity or prolonged exposure.)

Weather in El Cajon, California

02:08 AM

Now

70° F

Feels Like 70°

Precipitation 0 %

Wind 4 mph

Humidity 84 %

Today

Day 90°

Night 66°

Precipitation 11 %

Wind 7 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.

Other:

Partial bright sunlight.

El Cajon Weather Forecast Updated

41 minutes ago

Last updated on August 23, 2025 1:27 AM

Weather Forecast History

Last Year's Weather on This Day (August 23, 2024)

Day

82°

Night

64°

Air quality in El Cajon

NOW

63 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 19.72 µg/m³

PM10 21.82 µg/m³

O₃ 10.73 ppb

NO₂ 20.61 ppb

SO₂ 1.60 ppb

CO 296.58 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast