Hourly Weather | Today Monday, September 14, 2026
Greeley, Colorado
1 AM
Cloudy Night
63°
Feels Like 61°
36
Humidity: 62%
UV Index: 0
Wind: 8 mph
2 AM
Cloudy Night
61°
Feels Like 55°
20
Humidity: 60%
UV Index: 0
Wind: 9 mph
3 AM
Cloudy Weather
57°
Feels Like 54°
20
Humidity: 61%
UV Index: 0
Wind: 9 mph
4 AM
Cloudy Weather
55°
Feels Like 52°
20
Humidity: 64%
UV Index: 0
Wind: 9 mph
5 AM
Cloudy Weather
55°
Feels Like 52°
20
Humidity: 66%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Weather
54°
Feels Like 50°
20
Humidity: 70%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
54°
Feels Like 52°
16
Humidity: 70%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
50°
Feels Like 52°
5
Humidity: 77%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
55°
Feels Like 57°
5
Humidity: 67%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
57°
Feels Like 61°
6
Humidity: 61%
UV Index: 3
Wind: 7 mph
11 AM
Cloudy Weather
63°
Feels Like 66°
7
Humidity: 55%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
64°
Feels Like 70°
7
Humidity: 51%
UV Index: 5
Wind: 7 mph
1 PM
Cloudy Weather
66°
Feels Like 72°
11
Humidity: 47%
UV Index: 5
Wind: 9 mph
2 PM
Cloudy Weather
70°
Feels Like 72°
19
Humidity: 43%
UV Index: 4
Wind: 9 mph
3 PM
Cloudy Weather
72°
Feels Like 72°
19
Humidity: 40%
UV Index: 3
Wind: 9 mph
4 PM
Cloudy Weather
73°
Feels Like 72°
24
Humidity: 39%
UV Index: 2
Wind: 10 mph
5 PM
Sunny with a Chance of Thunderstorms
72°
Feels Like 66°
51
Humidity: 44%
UV Index: 1
Wind: 10 mph
6 PM
Cloudy Weather
70°
Feels Like 68°
47
Humidity: 46%
UV Index: 1
Wind: 10 mph
7 PM
Cloudy Weather
68°
Feels Like 64°
43
Humidity: 51%
UV Index: 0
Wind: 9 mph
8 PM
Cloudy Weather
64°
Feels Like 63°
43
Humidity: 59%
UV Index: 0
Wind: 9 mph
9 PM
Cloudy Weather
63°
Feels Like 59°
47
Humidity: 67%
UV Index: 0
Wind: 8 mph
10 PM
Stormy Weather
61°
Feels Like 55°
51
Humidity: 73%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Weather
61°
Feels Like 57°
40
Humidity: 78%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.65 µg/m³
  • PM10: 4.56 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.7 µg/m³
  • PM10: 4.48 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.8 µg/m³
  • PM10: 4.44 µg/m³
  • O3: 0.026 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.83 µg/m³
  • PM10: 4.46 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.77 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.56 µg/m³
  • PM10: 3.84 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.1 µg/m³
  • PM10: 3.05 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 2.35 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.25 µg/m³
  • PM10: 1.83 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.82 µg/m³
  • PM10: 1.4 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.87 µg/m³
  • PM10: 1.71 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 2.04 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 2.35 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.21 µg/m³
  • PM10: 2.42 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.22 µg/m³
  • PM10: 2.42 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.22 µg/m³
  • PM10: 2.38 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 2.31 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.15 µg/m³
  • PM10: 2.25 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 2.27 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.24 µg/m³
  • PM10: 2.44 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.33 µg/m³
  • PM10: 2.63 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.37 µg/m³
  • PM10: 2.71 µg/m³
  • O3: 0.022 ppm
  • NO2: 3.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 2.76 µg/m³
  • O3: 0.019 ppm
  • NO2: 4 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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