Today | Weather | Sunday, August 23, 2026

Weather in Santa Rosa, California

10:04 PM
Now
Cloudy Night
63° F
Feels Like 63°
Precipitation 0 %
Wind 5 mph
Humidity 76 %
Today
Cloudy Weather
Day 90°
Night 52°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 7

Santa Rosa Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (August 23, 2025)
Cloudy Night

Day

81°

Night

54°

Wind

6 mph

Precipitation

0 %

Air Quality in Santa Rosa

NOW
29 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.01 µg/m³
PM10 14.77 µg/m³
O3 0.031 ppm
NO2 0.4 ppb
SO2 0.3 ppb
CO 0.07 ppm
NH3 0 µg/m³
NO 0 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)
PM2.55.01 µg/m³
PM1014.77 µg/m³
O361.35 µg/m³
NO20.84 µg/m³
SO20.7 µg/m³
CO78.75 µg/m³
NH30 µg/m³
NO0 µg/m³