Hourly Weather | Today | Wednesday, August 13, 2025
Longmont, Colorado
5 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 57°
0
Humidity: 76%
Wind: 5 mph
UV Index: 0
6 AM
Cloudy NightCloudy night, overcast skies at night with no rain.
57°
Feels Like 55°
0
Humidity: 77%
Wind: 5 mph
UV Index: 0
7 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
61°
Feels Like 63°
0
Humidity: 68%
Wind: 5 mph
UV Index: 1
8 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
66°
Feels Like 68°
0
Humidity: 53%
Wind: 5 mph
UV Index: 2
9 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
73°
Feels Like 79°
0
Humidity: 40%
Wind: 5 mph
UV Index: 3
10 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
82°
Feels Like 88°
0
Humidity: 29%
Wind: 5 mph
UV Index: 5
11 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
88°
Feels Like 93°
0
Humidity: 21%
Wind: 6 mph
UV Index: 6
12 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
93°
Feels Like 100°
0
Humidity: 16%
Wind: 6 mph
UV Index: 8
1 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
97°
Feels Like 102°
0
Humidity: 14%
Wind: 7 mph
UV Index: 9
2 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
99°
Feels Like 104°
0
Humidity: 13%
Wind: 7 mph
UV Index: 8
3 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
99°
Feels Like 102°
0
Humidity: 12%
Wind: 6 mph
UV Index: 6
4 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
97°
Feels Like 99°
0
Humidity: 13%
Wind: 7 mph
UV Index: 5
5 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
93°
Feels Like 95°
0
Humidity: 16%
Wind: 7 mph
UV Index: 3
6 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
90°
Feels Like 90°
0
Humidity: 19%
Wind: 7 mph
UV Index: 2
7 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
86°
Feels Like 84°
0
Humidity: 23%
Wind: 7 mph
UV Index: 1
8 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
82°
Feels Like 81°
0
Humidity: 27%
Wind: 7 mph
UV Index: 0
9 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
79°
Feels Like 77°
0
Humidity: 32%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
75°
Feels Like 73°
0
Humidity: 37%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy NightCloudy night, overcast skies at night with no rain.
73°
Feels Like 72°
0
Humidity: 40%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 11.31 µg/m³
  • PM10: 18.31 µg/m³
  • O₃: 28.91 ppb
  • NO₂: 9.78 ppb
  • SO₂: 0.60 ppb
  • CO: 153.51 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: 11.17 µg/m³
  • PM10: 16.82 µg/m³
  • O₃: 27.51 ppb
  • NO₂: 9.50 ppb
  • SO₂: 0.60 ppb
  • CO: 152.78 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 11.27 µg/m³
  • PM10: 15.97 µg/m³
  • O₃: 30.53 ppb
  • NO₂: 8.39 ppb
  • SO₂: 0.64 ppb
  • CO: 157.35 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.01 µg/m³
  • PM10: 10.16 µg/m³
  • O₃: 32.49 ppb
  • NO₂: 6.52 ppb
  • SO₂: 0.73 ppb
  • CO: 170.21 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 10.16 µg/m³
  • PM10: 10.37 µg/m³
  • O₃: 36.87 ppb
  • NO₂: 5.29 ppb
  • SO₂: 0.77 ppb
  • CO: 173.53 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.71 µg/m³
  • PM10: 10.18 µg/m³
  • O₃: 44.77 ppb
  • NO₂: 3.97 ppb
  • SO₂: 0.85 ppb
  • CO: 152.04 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 8.44 µg/m³
  • PM10: 9.08 µg/m³
  • O₃: 52.67 ppb
  • NO₂: 2.65 ppb
  • SO₂: 0.93 ppb
  • CO: 130.54 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
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 6.94 µg/m³
  • PM10: 7.59 µg/m³
  • O₃: 60.57 ppb
  • NO₂: 1.32 ppb
  • SO₂: 1.01 ppb
  • CO: 109.05 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
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.46 µg/m³
  • PM10: 6.32 µg/m³
  • O₃: 60.66 ppb
  • NO₂: 1.10 ppb
  • SO₂: 0.89 ppb
  • CO: 104.53 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
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 6.00 µg/m³
  • O₃: 60.75 ppb
  • NO₂: 0.88 ppb
  • SO₂: 0.77 ppb
  • CO: 100.01 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
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 5.00 µg/m³
  • PM10: 5.82 µg/m³
  • O₃: 60.83 ppb
  • NO₂: 0.66 ppb
  • SO₂: 0.65 ppb
  • CO: 95.49 ppb

Health Recommendations:

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

4 PM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 5.76 µg/m³
  • O₃: 59.83 ppb
  • NO₂: 1.10 ppb
  • SO₂: 0.64 ppb
  • CO: 99.29 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
58 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 5.09 µg/m³
  • PM10: 5.88 µg/m³
  • O₃: 58.82 ppb
  • NO₂: 1.55 ppb
  • SO₂: 0.64 ppb
  • CO: 103.10 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
64 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 5.52 µg/m³
  • PM10: 6.26 µg/m³
  • O₃: 57.81 ppb
  • NO₂: 1.99 ppb
  • SO₂: 0.63 ppb
  • CO: 106.91 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
64 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 6.42 µg/m³
  • PM10: 7.03 µg/m³
  • O₃: 53.49 ppb
  • NO₂: 4.40 ppb
  • SO₂: 0.71 ppb
  • CO: 128.76 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
59 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 7.54 µg/m³
  • PM10: 8.25 µg/m³
  • O₃: 49.17 ppb
  • NO₂: 6.80 ppb
  • SO₂: 0.78 ppb
  • CO: 150.60 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
53 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 8.40 µg/m³
  • PM10: 9.14 µg/m³
  • O₃: 44.85 ppb
  • NO₂: 9.21 ppb
  • SO₂: 0.86 ppb
  • CO: 172.45 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
49 AQI
Good air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 8.64 µg/m³
  • PM10: 9.37 µg/m³
  • O₃: 39.73 ppb
  • NO₂: 9.76 ppb
  • SO₂: 0.86 ppb
  • CO: 179.77 ppb

Health Recommendations:

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

11 PM
48 AQI
Good air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 9.44 µg/m³
  • PM10: 10.03 µg/m³
  • O₃: 34.60 ppb
  • NO₂: 10.30 ppb
  • SO₂: 0.86 ppb
  • CO: 187.10 ppb

Health Recommendations:

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