Today | Weather | Thursday, February 5, 2026

Weather in Santa Rosa, California

05:34 PM
Now
Cloudy Night
66° F
Feels Like 64°
Precipitation 0 %
Wind 5 mph
Humidity 55 %
Today
Cloudy Weather
Day 72°
Night 43°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

Santa Rosa Weather Forecast Updated

7 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 5, 2025)
Partly Sunny with Showers

Day

55°

Night

39°

Wind

6 mph

UV Index

3

Precipitation

40 %

Air Quality in Santa Rosa

NOW
140 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 51.38 µg/m³
PM10 58.01 µg/m³
O3 0.056 ppm
NO2 8.2 ppb
SO2 1 ppb
CO 0.32 ppm
NH3 0.62 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.551.38 µg/m³
PM1058.01 µg/m³
O3110.18 µg/m³
NO215.47 µg/m³
SO22.53 µg/m³
CO365.31 µg/m³
NH30.62 µg/m³
NO0.02 µg/m³