Today | Weather | Sunday, May 24, 2026

Weather in Santa Rosa, California

09:57 PM
Now
Night
54° F
Feels Like 52°
Precipitation 0 %
Wind 7 mph
Humidity 88 %
Today
Cloudy Night
Day 66°
Night 48°
Precipitation 1 %
Wind 6 mph

Santa Rosa Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 24, 2025)
Cloudy Weather

Day

75°

Night

46°

Wind

7 mph

UV Index

11

Precipitation

0 %

Air Quality in Santa Rosa

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.47 µg/m³
PM10 7.55 µg/m³
O3 0.044 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.10 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)
PM2.52.47 µg/m³
PM107.55 µg/m³
O387.02 µg/m³
NO20.56 µg/m³
SO20.53 µg/m³
CO115.95 µg/m³
NH30 µg/m³
NO0 µg/m³