Today | Weather | Thursday, February 5, 2026

Weather in Tustin, California

02:56 PM
Now
Cloudy Weather
81° F
Feels Like 79°
Precipitation 7 %
Wind 15 mph
UV Index (0 - 11+) 1
Humidity 24 %
Today
Cloudy Weather
Day 82°
Night 55°
Precipitation 25 %
Wind 8 mph
UV Index (0 - 11+) 4

Tustin Weather Forecast Updated

Last updated on

Air Quality in Tustin

NOW
153 AQI
Unhealthy air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 60.35 µg/m³
PM10 79.57 µg/m³
O3 0.058 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.30 ppm
NH3 0 µg/m³
NO 0.07 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.560.35 µg/m³
PM1079.57 µg/m³
O3114.37 µg/m³
NO20.63 µg/m³
SO20.28 µg/m³
CO341.28 µg/m³
NH30 µg/m³
NO0.07 µg/m³