Today | Weather | Sunday, April 26, 2026

Weather in Santa Ana, California

08:24 AM
Now
Cloudy Weather
57° F
Feels Like 55°
Precipitation 47 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 85 %
Today
Cloudy Weather
Day 70°
Night 54°
Precipitation 55 %
Wind 10 mph
UV Index (0 - 11+) 5

Santa Ana Weather Forecast Updated

38 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 26, 2025)
Rainy Weather

Day

64°

Night

50°

Wind

9 mph

UV Index

4

Precipitation

91 %

Air Quality in Santa Ana

NOW
53 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.51 µg/m³
PM10 1.38 µg/m³
O3 0.055 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.01 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.50.51 µg/m³
PM101.38 µg/m³
O3108.14 µg/m³
NO20.22 µg/m³
SO20.22 µg/m³
CO126.32 µg/m³
NH30 µg/m³
NO0.01 µg/m³