Today | Weather | Sunday, August 17, 2025

Weather in Santa Ana, California

12:15 PM
Now
Cloudy WeatherCloudy weather, overcast skies with clouds.
75° F
Feels Like 81°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 11
Humidity 63 %
Today
Cloudy WeatherCloudy weather, overcast skies with clouds.
Day 81°
Night 64°
Precipitation 0 %
Wind 7 mph
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.

Other:

Areas of low cloud cover early; otherwise, mostly sunny and comfortable.

Santa Ana Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (August 17, 2024)

Cloudy WeatherCloudy weather, overcast skies with clouds.

Day

79°

Night

70°

Wind

6 mph

UV Index

9

Precipitation

0

Air quality in Santa Ana

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

Pollutant Concentrations:

PM2.5 12.07 µg/m³
PM10 17.34 µg/m³
O₃ 41.41 ppb
NO₂ 8.31 ppb
SO₂ 2.20 ppb
CO 205.76 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.