Today | Weather | Monday, August 24, 2026
Active Weather Warnings

Weather in Irvine, California

12:29 AM
Today
Cloudy Weather
Day 93°
Night 72°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Irvine Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (August 24, 2025)
Cloudy Weather

Day

88°

Night

70°

Wind

7 mph

UV Index

90

Precipitation

0 %

Air Quality in Irvine

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.27 µg/m³
PM10 23.39 µg/m³
O3 0.036 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.07 ppm
NH3 0 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.57.27 µg/m³
PM1023.39 µg/m³
O369.97 µg/m³
NO20.59 µg/m³
SO20.58 µg/m³
CO81.42 µg/m³
NH30 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Irvine

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 22 at 1:10PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA
Aug 22, 1:10 PM Aug 25, 10:00 AM
WHAT: Temperatures 90 to 97 for Inland Orange County, 90 to 102
for the San Diego County Valleys, 98 to 106 for the Inland Empire
and 89 to 100 in the mountains. Temperatures increase another few
degrees into the middle and end of next week, making for a
prolonged and dangerous stretch of heat.

WHERE: Orange County Inland Areas, Riverside County Mountains,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Mountains, San Diego County Valleys, and Santa Ana
Mountains and Foothills.

WHEN: For the Heat Advisory, until 10 AM PDT Tuesday. For the
Extreme Heat Watch, from Tuesday morning through Friday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

ADDITIONAL DETAILS: Low temperatures 5 to 10 degrees above normal
will limit relief from the heat. Increasing temperatures into the
middle of next week will increase the threat of heat-related
illness across populations.
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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.
Updated: Aug 22, 5:24 PM Source: NWS Alert