Today | Weather | Wednesday, February 25, 2026

Weather in Napa, California

08:19 PM
Now
Cloudy Night
57° F
Feels Like 57°
Precipitation 37 %
Wind 6 mph
Humidity 91 %
Today
Cloudy Night
Day 64°
Night 52°
Precipitation 40 %
Wind 5 mph

Napa Weather Forecast Updated

Last updated on

Air Quality in Napa

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.34 µg/m³
PM10 8.76 µg/m³
O3 0.028 ppm
NO2 1.7 ppb
SO2 0.3 ppb
CO 0.11 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)
PM2.55.34 µg/m³
PM108.76 µg/m³
O355.93 µg/m³
NO23.13 µg/m³
SO20.85 µg/m³
CO129.95 µg/m³
NH30 µg/m³
NO0 µg/m³