1. North America
  2. United States
  3. California
  4. Napa County
  5. St. Helena

St. Helena

Napa County, California

2026-09-02 00:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
57.3
PM2.5
μg/m³
3.8
PM10
μg/m³
10.8
CO
μg/m³
193
NO2
μg/m³
0.9
Weather
  • ℃
  • ℉
20℃
63%
2 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • CO
  • NO2

Get the App

Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.

iPhone, iPad

Android

Cities Nearby

St. Helena
AQI 25
Deer Park
AQI 25
Rutherford
AQI 29
Angwin
AQI 21
Oakville
AQI 29
Kenwood
AQI 23
Calistoga
AQI 23
Yountville
AQI 24
Glen Ellen
AQI 23
Eldridge
AQI 23
Fetters Hot Springs-Agua Caliente
AQI 27