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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today | Wednesday, September 3, 2025
Westminster, Colorado
3 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 57°
0
Humidity: 56%
Wind: 6 mph
UV Index: 0
4 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 55°
0
Humidity: 59%
Wind: 6 mph
UV Index: 0
5 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 55°
0
Humidity: 58%
Wind: 6 mph
UV Index: 0
6 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 55°
0
Humidity: 57%
Wind: 6 mph
UV Index: 0
7 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
61°
Feels Like 59°
0
Humidity: 52%
Wind: 6 mph
UV Index: 4
8 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
64°
Feels Like 66°
0
Humidity: 41%
Wind: 5 mph
UV Index: 15
9 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
72°
Feels Like 73°
0
Humidity: 34%
Wind: 5 mph
UV Index: 25
10 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
77°
Feels Like 81°
0
Humidity: 27%
Wind: 7 mph
UV Index: 38
11 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
81°
Feels Like 84°
0
Humidity: 23%
Wind: 9 mph
UV Index: 51
12 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
84°
Feels Like 88°
0
Humidity: 19%
Wind: 9 mph
UV Index: 67
1 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
86°
Feels Like 90°
0
Humidity: 17%
Wind: 9 mph
UV Index: 74
2 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
88°
Feels Like 91°
0
Humidity: 16%
Wind: 8 mph
UV Index: 67
3 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
88°
Feels Like 91°
0
Humidity: 16%
Wind: 7 mph
UV Index: 51
4 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
90°
Feels Like 91°
0
Humidity: 15%
Wind: 7 mph
UV Index: 38
5 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
88°
Feels Like 88°
0
Humidity: 15%
Wind: 7 mph
UV Index: 25
6 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
84°
Feels Like 84°
0
Humidity: 16%
Wind: 7 mph
UV Index: 15
7 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
82°
Feels Like 81°
0
Humidity: 18%
Wind: 6 mph
UV Index: 4
8 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
79°
Feels Like 75°
0
Humidity: 22%
Wind: 7 mph
UV Index: 0
9 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
75°
Feels Like 73°
0
Humidity: 26%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
73°
Feels Like 70°
0
Humidity: 30%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
70°
Feels Like 68°
0
Humidity: 35%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.68 µg/m³
  • PM10: 16.39 µg/m³
  • O₃: 29.64 ppb
  • NO₂: 16.58 ppb
  • SO₂: 0.41 ppb
  • CO: 204.58 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 AM
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.51 µg/m³
  • PM10: 13.57 µg/m³
  • O₃: 29.23 ppb
  • NO₂: 14.03 ppb
  • SO₂: 0.40 ppb
  • CO: 191.76 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 AM
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 7.55 µg/m³
  • PM10: 11.63 µg/m³
  • O₃: 29.31 ppb
  • NO₂: 11.96 ppb
  • SO₂: 0.38 ppb
  • CO: 177.56 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 AM
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.76 µg/m³
  • PM10: 10.18 µg/m³
  • O₃: 29.63 ppb
  • NO₂: 10.14 ppb
  • SO₂: 0.35 ppb
  • CO: 162.66 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 AM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 5.10 µg/m³
  • O₃: 29.10 ppb
  • NO₂: 6.50 ppb
  • SO₂: 0.39 ppb
  • CO: 166.05 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 AM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.12 µg/m³
  • PM10: 5.24 µg/m³
  • O₃: 30.22 ppb
  • NO₂: 6.64 ppb
  • SO₂: 0.42 ppb
  • CO: 178.82 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 AM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.76 µg/m³
  • PM10: 5.92 µg/m³
  • O₃: 31.33 ppb
  • NO₂: 6.77 ppb
  • SO₂: 0.44 ppb
  • CO: 191.58 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.24 µg/m³
  • PM10: 5.35 µg/m³
  • O₃: 42.85 ppb
  • NO₂: 4.85 ppb
  • SO₂: 0.46 ppb
  • CO: 166.61 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.33 µg/m³
  • PM10: 5.80 µg/m³
  • O₃: 54.36 ppb
  • NO₂: 2.93 ppb
  • SO₂: 0.48 ppb
  • CO: 141.64 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.78 µg/m³
  • PM10: 6.49 µg/m³
  • O₃: 65.88 ppb
  • NO₂: 1.01 ppb
  • SO₂: 0.50 ppb
  • CO: 116.67 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.69 µg/m³
  • PM10: 6.76 µg/m³
  • O₃: 66.97 ppb
  • NO₂: 0.93 ppb
  • SO₂: 0.47 ppb
  • CO: 115.33 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
51 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.00 µg/m³
  • PM10: 6.83 µg/m³
  • O₃: 68.07 ppb
  • NO₂: 0.84 ppb
  • SO₂: 0.43 ppb
  • CO: 114.00 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
49 AQI
Good air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 5.82 µg/m³
  • PM10: 6.92 µg/m³
  • O₃: 69.17 ppb
  • NO₂: 0.76 ppb
  • SO₂: 0.39 ppb
  • CO: 112.67 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

4 PM
61 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 5.97 µg/m³
  • PM10: 7.07 µg/m³
  • O₃: 67.80 ppb
  • NO₂: 1.33 ppb
  • SO₂: 0.40 ppb
  • CO: 116.81 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
76 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 6.18 µg/m³
  • PM10: 7.28 µg/m³
  • O₃: 66.42 ppb
  • NO₂: 1.89 ppb
  • SO₂: 0.41 ppb
  • CO: 120.95 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
85 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 6.78 µg/m³
  • PM10: 7.85 µg/m³
  • O₃: 65.05 ppb
  • NO₂: 2.46 ppb
  • SO₂: 0.43 ppb
  • CO: 125.09 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
85 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 8.25 µg/m³
  • PM10: 9.23 µg/m³
  • O₃: 55.66 ppb
  • NO₂: 8.06 ppb
  • SO₂: 0.54 ppb
  • CO: 171.41 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 PM
77 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 10.32 µg/m³
  • PM10: 11.30 µg/m³
  • O₃: 46.26 ppb
  • NO₂: 13.66 ppb
  • SO₂: 0.65 ppb
  • CO: 217.73 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 PM
65 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 11.71 µg/m³
  • PM10: 12.64 µg/m³
  • O₃: 36.86 ppb
  • NO₂: 19.27 ppb
  • SO₂: 0.76 ppb
  • CO: 264.05 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 PM
50 AQI
Good air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 11.98 µg/m³
  • PM10: 12.75 µg/m³
  • O₃: 31.38 ppb
  • NO₂: 18.95 ppb
  • SO₂: 0.71 ppb
  • CO: 266.36 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

11 PM
45 AQI
Good air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 11.79 µg/m³
  • PM10: 12.37 µg/m³
  • O₃: 25.90 ppb
  • NO₂: 18.63 ppb
  • SO₂: 0.66 ppb
  • CO: 268.67 ppb

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

Current Real-Time Air Quality Report