Today | Weather | Tuesday, February 3, 2026

Weather in Santa Ana, California

04:39 PM
Now
Sunny Weather
77° F
Feels Like 75°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 0
Humidity 47 %
Today
Cloudy Weather
Day 86°
Night 54°
Precipitation 25 %
Wind 4 mph
UV Index (0 - 11+) 4

Santa Ana Weather Forecast Updated

1 minute ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 3, 2025)
Cloudy Weather

Day

66°

Night

52°

Wind

4 mph

UV Index

3

Precipitation

65 %

Air Quality in Santa Ana

NOW
163 AQI
Unhealthy air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 66.7 µg/m³
PM10 78.6 µg/m³
O3 0.090 ppm
NO2 1 ppb
SO2 0.7 ppb
CO 0.33 ppm
NH3 0.02 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:

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

Show raw pollutant concentrations (µg/m³)
PM2.566.7 µg/m³
PM1078.6 µg/m³
O3177.08 µg/m³
NO21.89 µg/m³
SO21.91 µg/m³
CO379.05 µg/m³
NH30.02 µg/m³
NO0.02 µg/m³