Today | Weather | Monday, September 14, 2026

Weather in Santa Rosa, California

08:32 PM
Now
Cloudy Night
64° F
Feels Like 64°
Precipitation 0 %
Wind 4 mph
Humidity 61 %
Today
Cloudy Night
Day 84°
Night 46°
Precipitation 0 %
Wind 4 mph

Santa Rosa Weather Forecast Updated

7 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Cloudy Weather

Day

86°

Night

54°

Wind

6 mph

UV Index

60

Precipitation

1 %

Air Quality in Santa Rosa

NOW
38 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.29 µg/m³
PM10 22.69 µg/m³
O3 0.041 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.16 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)
PM2.56.29 µg/m³
PM1022.69 µg/m³
O379.88 µg/m³
NO20.6 µg/m³
SO20.74 µg/m³
CO182.86 µg/m³
NH30 µg/m³
NO0 µg/m³