Outdoor
Outdoor activity is generally possible, but conditions are not ideal.
Why: AQI or pollutant levels are elevated, so this guidance is more cautious.
Denver, Colorado, United States
Denver air quality today
Outdoor activity is generally possible, but conditions are not ideal.
Data: Hourly Open-Meteo model estimateThe latest update is older than expected, so this page is showing an estimate for the current hour.Detailed metrics and guidance use the latest available detailed data.
Practical guidance
Running
Outdoor running is generally fine. If you are sensitive to air pollution, consider keeping the effort easy.
Why: Air quality indicators are elevated, so the running guidance is more cautious.
Ventilation
Consider waiting before longer ventilation.
Why: PM2.5, PM10, NO2 or ozone is elevated, so longer ventilation may bring more outdoor pollution indoors.
Air quality and outdoor metrics
US AQI
Air Quality Index
68
Moderate
PM2.5
Fine particulate matter
14.5µg/m³
Moderate
PM10
Coarse particulate matter
16.2µg/m³
Low
NO₂
Nitrogen dioxide
21µg/m³
Low
O₃
Ozone
55µg/m³
Low
UV index
Sun exposure level
3
Moderate
Temperature
Air temperature
7°C
Cool
Feels like
Apparent temperature
6°C
Cool
Wind
Wind speed
5km/h
Light
Humidity
Relative humidity
100%
Humid
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Disclaimer
This information is a general estimate only and is not medical advice.
Location
Denver, United States
Coordinates: 39.7392, -104.9903 · America/Denver
Interpret AQI for outdoor activity
Calculic's European AQI calculator assesses the value using your population group and planned activity intensity.
Interpret AQI in CalculicThis page's European AQI value, city and timestamp are passed to the calculator through the link.
What affects air quality in Denver
The City and County of Denver identifies transportation as its leading air-pollution source, with highway vehicles, airports, railroads and non-road fuel use included in the transportation inventory.
This is Denver's planning inventory based on 2017 emissions data, not a statement about current conditions or every neighborhood.
Local monitoring and context
Colorado's 2024 network plan lists CAMP, La Casa, I-25 Denver and I-25 Globeville as nitrogen-dioxide monitoring sites in Denver County.
The plan's site inventory is county-scoped; individual monitors have distinct objectives and do not supply this page's current AQI.
City air quality FAQ
How should I read the AQI for Denver?
US AQI condenses air quality into one value. On this page, it helps you quickly judge whether conditions look good, moderate or more polluted than usual.
Is the air quality good for going outside?
Check the outdoor and running cards first. They combine AQI, particles, ozone, weather and other factors that can affect outdoor comfort.
Should I ventilate right now?
The ventilation card considers AQI and pollutants such as particles, nitrogen dioxide and ozone. If values are elevated, a shorter opening or a later moment may be better.
Why can air quality change during the day?
Weather, emissions, ozone formation, particles and air flow can shift local conditions, so the next hours can differ from the current reading.
Sources and methodology
Current data
This page uses US AQI.
Current and hourly air-quality values are CAMS-based model estimates, not measurements from a local monitoring station. They may not reflect street-level conditions.
- Displayed state
- This hour's model estimate
- Data time
- 31 Oct 2026, 11:00 am
- Weather data
- Open-Meteo
- Air-quality model data
- Copernicus Atmosphere Monitoring Service (CAMS). Open-Meteo selects data suited to this location. Possible CAMS datasets: CAMS European air quality forecasts, ENSEMBLE data; CAMS global atmospheric composition forecasts.
- Licence
- CC BY 4.0
City Air Quality selects the active data package, combines weather and air-quality data, chooses the current or latest usable model value, and formats it for this page.
The latest update is older than expected, so this page is showing an estimate for the current hour.
Detailed metrics and guidance use the latest available detailed data.
Evergreen city statements
Each local statement is linked to a checked primary-authority source. A source check is editorial provenance and does not describe current-data freshness.
Local sources support the background claims below; they are not the source of the current data shown above unless explicitly stated otherwise.
Authoritative sources for local statements
Denver Moves Everyone — 2022 State of the System
City and County of Denver
- Scope
- Denver
- Source checked
- 23 Aug 2026
Section 3.3.2 identifies transportation as Denver's leading air-pollution source and breaks the inventory into highway vehicles, airports, railroads and non-road fuel use.
Applicability: City transportation-planning report; its source inventory uses 2017 EPA emissions data and is not current AQI provenance.
Based on this source: The City and County of Denver identifies transportation as its leading air-pollution source, with highway vehicles, airports, railroads and non-road fuel use included in the transportation inventory.
2024 Annual Air Monitoring Network Plan
Colorado Department of Public Health and Environment
- Scope
- Denver County
- Source checked
- 23 Aug 2026
PDF page 25, Table 4.1, lists CAMP, La Casa, I-25 Denver and I-25 Globeville as Denver County nitrogen-dioxide sites.
Applicability: Official 2024 network plan; the listed Denver County sites have separate monitoring objectives and are not a single citywide reading.
Based on this source: Colorado's 2024 network plan lists CAMP, La Casa, I-25 Denver and I-25 Globeville as nitrogen-dioxide monitoring sites in Denver County.