Hourly Weather | Today › Sunday, October 4, 2026
Greeley, Colorado
12 PM
Sunny Weather
73°
Feels Like 77°
0
Humidity: 40%
UV Index: 4
Wind: 6 mph
1 PM
Sunny Weather
75°
Feels Like 81°
0
Humidity: 35%
UV Index: 5
Wind: 7 mph
2 PM
Sunny Weather
79°
Feels Like 82°
0
Humidity: 30%
UV Index: 4
Wind: 7 mph
3 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 26%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 24%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 25%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
79°
Feels Like 75°
0
Humidity: 30%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 36%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 39%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 46%
UV Index: 0
Wind: 6 mph
10 PM
Night
64°
Feels Like 63°
0
Humidity: 53%
UV Index: 0
Wind: 6 mph
11 PM
Night
61°
Feels Like 59°
0
Humidity: 59%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.15 µg/m³
  • PM10: 6.97 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 5.84 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.33 µg/m³
  • PM10: 5.22 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.26 µg/m³
  • PM10: 5.08 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.42 µg/m³
  • PM10: 5.26 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.63 µg/m³
  • PM10: 5.52 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.1 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 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 5.6 µg/m³
  • O3: 0.044 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.67 µg/m³
  • PM10: 5.72 µg/m³
  • O3: 0.041 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.76 µg/m³
  • PM10: 5.91 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.74 µg/m³
  • PM10: 5.9 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.52 µg/m³
  • PM10: 5.63 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.37 µg/m³
  • PM10: 5.41 µg/m³
  • O3: 0.027 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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