Today | Weather | Tuesday, April 21, 2026

Weather in Santa Barbara, California

05:24 PM
Now
Cloudy Weather
66° F
Feels Like 64°
Precipitation 20 %
Wind 10 mph
UV Index (0 - 11+) 1
Humidity 65 %
Today
Partly Sunny with Showers
Day 66°
Night 50°
Precipitation 100 %
Wind 9 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Santa Barbara Weather Forecast Updated

Last updated on

Air Quality in Santa Barbara

NOW
64 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.96 µg/m³
PM10 3 µg/m³
O3 0.058 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.12 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 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)
PM2.50.96 µg/m³
PM103 µg/m³
O3114.73 µg/m³
NO20.16 µg/m³
SO20.29 µg/m³
CO137.58 µg/m³
NH30 µg/m³
NO0.02 µg/m³