Today | Weather | Saturday, September 20, 2025

Weather in Irvine, California

01:27 AM
Now
Cloudy Night
68° F
Feels Like 68°
Precipitation 0 %
Wind 4 mph
Humidity 87 %
Today
Sunny Weather
Day 84°
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.

Irvine Weather Forecast Updated

32 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 20, 2024)

Partly Sunny with Showers

Day

75°

Night

63°

Wind

6 mph

UV Index

7

Precipitation

49

Air quality in Irvine

NOW
52 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 19.33 µg/m³
PM10 22.31 µg/m³
O₃ 10.40 ppb
NO₂ 22.66 ppb
SO₂ 2.68 ppb
CO 198.79 ppb
PM2.5 – 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.