Today | Weather | Tuesday, November 3, 2026

Weather in Santa Ana, California

03:25 PM
Now
Cloudy Weather
73° F
Feels Like 73°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 2
Humidity 48 %
Today
Cloudy Weather
Day 79°
Night 57°
Precipitation 2 %
Wind 5 mph
UV Index (0 - 11+) 4

Santa Ana Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 3, 2025)
Cloudy Night

Day

75°

Night

55°

Wind

4 mph

Precipitation

0 %

Air Quality in Santa Ana

NOW
50 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.73 µg/m³
PM10 9.21 µg/m³
O3 0.054 ppm
NO2 0.1 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0.02 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)
PM2.5 – 2.73 µg/m³
PM10 – 9.21 µg/m³
O3 – 105.5 µg/m³
NO2 – 0.24 µg/m³
SO2 – 0.41 µg/m³
CO – 114.97 µg/m³
NH3 – 0 µg/m³
NO – 0.02 µg/m³