Hourly Weather Forecast for Irvine, California

Hourly Weather | Today › Wednesday, September 9, 2026

Active Weather Warnings

Extreme Heat Warning
Heat Advisory

Irvine, California

7 PM

93°

Feels Like 95°

Humidity: 45%

UV Index: 0

Wind: 6 mph

8 PM

91°

Feels Like 93°

Humidity: 49%

UV Index: 0

Wind: 6 mph

9 PM

88°

Feels Like 90°

Humidity: 55%

UV Index: 0

Wind: 6 mph

10 PM

84°

Feels Like 88°

Humidity: 62%

UV Index: 0

Wind: 6 mph

11 PM

82°

Feels Like 84°

Humidity: 67%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 PM

79 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 14.34 µg/m³
PM₁₀: 29.21 µg/m³
O₃: 0.063 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.14 ppm

Health Recommendations:

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

8 PM

81 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 15.14 µg/m³
PM₁₀: 31.09 µg/m³
O₃: 0.064 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.14 ppm

Health Recommendations:

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

9 PM

87 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 16.09 µg/m³
PM₁₀: 32.86 µg/m³
O₃: 0.066 ppm
NO₂: 0.5 ppb
SO₂: 0.3 ppb
CO: 0.14 ppm

Health Recommendations:

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

10 PM

97 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 17.52 µg/m³
PM₁₀: 35.43 µg/m³
O₃: 0.069 ppm
NO₂: 0.4 ppb
SO₂: 0.3 ppb
CO: 0.14 ppm

Health Recommendations:

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

11 PM

107 AQI

Unhealthy air quality for sensitive groups Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 19.37 µg/m³
PM₁₀: 38.53 µg/m³
O₃: 0.072 ppm
NO₂: 0.4 ppb
SO₂: 0.3 ppb
CO: 0.14 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Irvine

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued September 9 at 2:25PM PDT until September 10 at 8:00PM PDT by NWS San Diego CA

Sep 9, 2:25 PM → Sep 10, 8:00 PM

WHAT: For the Extreme Heat Warning, dangerously hot conditions
with high temperatures of 90 to 100 on Thursday. Morning low
temperatures in the 70s expected.

WHERE: Orange County Inland Areas.

WHEN: Until 8 PM PDT Thursday.

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

ADDITIONAL DETAILS: Major HeatRisk through today. Moderate to
major HeatRisk on Thursday. Warm overnight temperatures will limit
relief from the heat.

+ Read More

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: Sep 9, 5:26 PM Source: NWS Alert

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 7 at 8:16PM PDT until September 10 at 8:00PM PDT by NWS San Diego CA

Sep 8, 10:00 AM → Sep 10, 8:00 PM

WHAT: High temperatures in the mid to upper 90s expected and
overnight lows in the mid-70s.

WHERE: Orange County Inland Areas and Santa Ana Mountains and
Foothills.

WHEN: From 10 AM Tuesday to 8 PM PDT Thursday.

IMPACTS: Hot temperatures may cause heat illnesses.

ADDITIONAL DETAILS: Moderate to major HeatRisk. Elevated low
temperatures will limit overnight relief from the heat.

+ Read More

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Updated: Sep 8, 1:58 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Irvine

Extreme Heat Warning

Heat Advisory

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