Today | Weather | Sunday, September 7, 2025

Weather in El Cajon, California

03:33 AM

Now

64° F

Feels Like 64°

Precipitation 0 %

Wind 4 mph

Humidity 90 %

Today

Day 91°

Night 64°

Precipitation 0 %

Wind 11

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

46 minutes ago

Last updated on September 07, 2025 2:46 AM

Air quality in El Cajon

NOW

59 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 19.83 µg/m³

PM10 21.21 µg/m³

O₃ 5.96 ppb

NO₂ 18.98 ppb

SO₂ 1.00 ppb

CO 254.85 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