Worst air pollution Guerneville, today and tomorrow
Today (15 July): Air quality in Guerneville is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 33.8/100).
Tomorrow (16 July 2026): Air quality in Guerneville is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 32.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Guerneville's air quality is shaped largely by cool coastal fog; wildfire smoke in dry summers is the leading regional concern. Day-to-day conditions in Guerneville can still vary with local weather, wind direction, and time of year. Local topography and prevailing winds both play a role in how quickly conditions change.
Today - 15 July | Pollution peaks at 10:00
AQI:
Fair
33.8/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
7.7/100
NO2 (nitrogen dioxide):
Good
13.2/100
O3 (ozone):
Fair
33.8/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
6.7/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 12:00
AQI:
Fair
32.8/100
PM2.5 (fine particles):
Good
18.1/100
PM10 (coarse particles):
Good
9.8/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
12.4/100
Pollen forecast in Guerneville
View pollen forecastFrequently Asked Questions
Is air quality bad in Guerneville right now?
On 15 July 2026, overall air quality in Guerneville is fair. AQI is the main air quality indicator at 33.8/100. Pollution peaks around 10:00 AM (O3: 33.8/100).
Will air quality be worse tomorrow in Guerneville?
On 16 July 2026, air quality conditions in Guerneville will be similar to today, with AQI forecast at fair at 32.8/100. Pollution peaks around 12:00 PM (O3: 32.8/100).
When is air pollution at its worst in Guerneville?
Guerneville's air quality has a clear seasonal rhythm — the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, whereas summer sunshine and heat drive some of the worst ozone readings in the country. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Guerneville based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app