Worst air pollution Downtown Weiser - Weiser, today and tomorrow
Today (9 August): Air quality in Downtown Weiser is poor. AQI and NO2 are poor; PM2.5, PM10, and PM1 are fair; O3 is medium; SO2, CO, and HCHO are good. Pollution peaks around 12:00 AM (NO2: 63.1/100).
Tomorrow (10 August 2026): Air quality in Downtown Weiser is poor. PM10 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 70.5/100). Airmine updates local air quality forecasts four times daily.
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Downtown Weiser sits at the city's small downtown near the Snake and Weiser Rivers; air quality here tracks closely with the wider Weiser area and the same regional influences that shape it. Any local variation tends to be minor compared with the seasonal swings seen across the wider city.
Today - 9 August | Pollution peaks at 00:00
AQI:
Poor
63.1/100
PM2.5 (fine particles):
Fair
38.7/100
PM10 (coarse particles):
Fair
26.6/100
NO2 (nitrogen dioxide):
Poor
63.1/100
O3 (ozone):
Medium
40.9/100
SO2 (sulfur dioxide):
Good
11.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.2/100
PM1 (ultrafine particles):
Fair
26.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 23:00
AQI:
Poor
70.5/100
PM2.5 (fine particles):
Fair
28.5/100
PM10 (coarse particles):
Good
19.8/100
NO2 (nitrogen dioxide):
Poor
70.5/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
8.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Fair
20.6/100
Other Landmarks in Weiser
Frequently Asked Questions
Is air quality bad in Downtown Weiser right now?
On 9 August 2026, overall air quality in Downtown Weiser is poor. AQI is the main air quality indicator at 63.1/100. Pollution peaks around 12:00 AM (NO2: 63.1/100).
Will air quality be worse tomorrow in Downtown Weiser?
On 10 August 2026, air quality conditions in Downtown Weiser will be similar to today, with AQI forecast at poor at 70.5/100. Pollution peaks around 11:00 PM (NO2: 70.5/100).
When is air pollution at its worst in Downtown Weiser?
Downtown Weiser's air quality follows a clear seasonal pattern, as spring and autumn generally bring the cleanest, most stable air; by contrast, both summer smoke and winter cold-air inversions bring recurring rough patches for local air quality. Valley and basin locations are especially prone to these winter inversion episodes compared to more exposed, higher terrain.
Are air quality levels in Downtown Weiser 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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