Hourly Weather Forecast for Tustin, California

Hourly Weather | Today › Wednesday, October 7, 2026

Active Weather Warnings

Extreme Heat Warning

Tustin, California

10 PM

77°

Feels Like 79°

Humidity: 70%

UV Index: 0

Wind: 5 mph

11 PM

75°

Feels Like 75°

Humidity: 76%

UV Index: 0

Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 PM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.94 µg/m³
PM₁₀: 24.13 µg/m³
O₃: 0.044 ppm
NO₂: 0.5 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.96 µg/m³
PM₁₀: 24.3 µg/m³
O₃: 0.043 ppm
NO₂: 0.4 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Tustin

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 mid
90s to 100. Nights will be very warm with low temperatures in the
low 70s.

WHERE: Orange County Inland Areas.

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, 8:11 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Tustin

Extreme Heat Warning

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