Hourly Weather Forecast for El Cajon, California

Hourly Weather | Today › Wednesday, October 7, 2026

Active Weather Warnings

Extreme Heat Warning

El Cajon, California

10 PM

79°

Feels Like 77°

Humidity: 53%

UV Index: 0

Wind: 5 mph

11 PM

75°

Feels Like 75°

Humidity: 61%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 PM

53 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 13.31 µg/m³
PM₁₀: 26.43 µg/m³
O₃: 0.049 ppm
NO₂: 0.4 ppb
SO₂: 0.2 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM

52 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 12.76 µg/m³
PM₁₀: 25.36 µg/m³
O₃: 0.048 ppm
NO₂: 0.4 ppb
SO₂: 0.2 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for El Cajon

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued October 7 at 11:47AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

Oct 7, 11:47 AM → Oct 8, 8:00 PM

WHAT: Dangerously hot conditions with high temperatures in the
upper 90s to 105. Nights will be very warm with low temperatures in
the mid 60s to low 70s.

WHERE: San Diego County Valleys.

WHEN: Until 8 PM PDT Thursday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events.

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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Updated: Oct 7, 8:31 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for El Cajon

Extreme Heat Warning

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