Hourly Weather | Today Sunday, August 30, 2026
Longmont, Colorado
2 AM
Cloudy Night
66°
Feels Like 64°
3
Humidity: 64%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Weather
66°
Feels Like 63°
3
Humidity: 70%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
64°
Feels Like 63°
3
Humidity: 71%
UV Index: 0
Wind: 5 mph
5 AM
Cloudy Night
64°
Feels Like 64°
3
Humidity: 72%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Night
64°
Feels Like 64°
3
Humidity: 73%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
64°
Feels Like 64°
4
Humidity: 75%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
66°
Feels Like 66°
7
Humidity: 67%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
72°
Feels Like 73°
7
Humidity: 56%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
77°
Feels Like 81°
7
Humidity: 46%
UV Index: 3
Wind: 5 mph
11 AM
Cloudy Weather
81°
Feels Like 84°
7
Humidity: 39%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
82°
Feels Like 88°
7
Humidity: 34%
UV Index: 5
Wind: 6 mph
1 PM
Cloudy Weather
86°
Feels Like 88°
10
Humidity: 30%
UV Index: 4
Wind: 8 mph
2 PM
Sunny with a Chance of Thunderstorms
82°
Feels Like 79°
51
Humidity: 40%
UV Index: 3
Wind: 9 mph
3 PM
Cloudy Weather
82°
Feels Like 82°
47
Humidity: 38%
UV Index: 3
Wind: 10 mph
4 PM
Cloudy Weather
84°
Feels Like 86°
44
Humidity: 33%
UV Index: 4
Wind: 9 mph
5 PM
Cloudy Weather
84°
Feels Like 84°
46
Humidity: 31%
UV Index: 3
Wind: 8 mph
6 PM
Cloudy Weather
82°
Feels Like 82°
49
Humidity: 32%
UV Index: 1
Wind: 7 mph
7 PM
Sunny with a Chance of Thunderstorms
79°
Feels Like 73°
54
Humidity: 41%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
77°
Feels Like 73°
40
Humidity: 46%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
75°
Feels Like 72°
34
Humidity: 49%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
72°
Feels Like 70°
40
Humidity: 53%
UV Index: 0
Wind: 6 mph
11 PM
Stormy Weather
70°
Feels Like 64°
51
Humidity: 64%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
18 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.57 µg/m³
  • PM10: 2.04 µg/m³
  • O3: 0.020 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 2.11 µg/m³
  • O3: 0.020 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.6 µg/m³
  • PM10: 2.16 µg/m³
  • O3: 0.021 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 AM
20 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.021 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.58 µg/m³
  • PM10: 2.16 µg/m³
  • O3: 0.021 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.55 µg/m³
  • PM10: 2.13 µg/m³
  • O3: 0.020 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 2.06 µg/m³
  • O3: 0.021 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 1.97 µg/m³
  • O3: 0.024 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.2 µg/m³
  • PM10: 2.17 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 2.84 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.46 µg/m³
  • PM10: 3.32 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 3.75 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.75 µg/m³
  • PM10: 3.77 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.79 µg/m³
  • PM10: 3.58 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.79 µg/m³
  • PM10: 3.32 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 3.15 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.79 µg/m³
  • PM10: 3 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.67 µg/m³
  • PM10: 2.62 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.57 µg/m³
  • PM10: 2.33 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.54 µg/m³
  • PM10: 2.21 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 2.11 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.44 µg/m³
  • PM10: 2.05 µg/m³
  • O3: 0.024 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.