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

St. Helena

Napa County, California

2026-09-07 18:00
AQI (India)
Good
Pollutants|Pollens
O3
μg/m³
40.4
CO
μg/m³
360
PM10
μg/m³
6.4
PM2.5
μg/m³
3.3
NO2
μg/m³
2.6
Weather
  • ℃
  • ℉
25℃
42%
5 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (India)
  • Pollen
  • O3
  • CO
  • PM10
  • PM2.5
  • 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 41
Deer Park
AQI 41
Rutherford
AQI 47
Angwin
AQI 29
Oakville
AQI 47
Kenwood
AQI 4
Calistoga
AQI 4
Yountville
AQI 43
Glen Ellen
AQI 4
Eldridge
AQI 4
Fetters Hot Springs-Agua Caliente
AQI 46