Hourly Weather Forecast for Cheyenne, Wyoming

Hourly Weather | Today › Thursday, July 23, 2026

Active Weather Warnings

Flood Watch

Cheyenne, Wyoming

3 AM

63°

Feels Like 61°

Humidity: 93%

UV Index: 0

Wind: 8 mph

4 AM

61°

Feels Like 57°

Humidity: 96%

UV Index: 0

Wind: 8 mph

5 AM

61°

Feels Like 57°

Humidity: 98%

UV Index: 0

Wind: 7 mph

6 AM

57°

Feels Like 55°

Humidity: 100%

UV Index: 0

Wind: 7 mph

7 AM

61°

Feels Like 61°

Humidity: 96%

UV Index: 1

Wind: 7 mph

8 AM

64°

Feels Like 64°

Humidity: 84%

UV Index: 1

Wind: 7 mph

9 AM

68°

Feels Like 70°

Humidity: 73%

UV Index: 2

Wind: 7 mph

10 AM

72°

Feels Like 72°

Humidity: 64%

UV Index: 3

Wind: 9 mph

11 AM

73°

Feels Like 75°

Humidity: 56%

UV Index: 4

Wind: 10 mph

12 PM

79°

Feels Like 81°

Humidity: 50%

UV Index: 5

Wind: 10 mph

1 PM

75°

Feels Like 79°

Humidity: 55%

UV Index: 6

Wind: 10 mph

2 PM

72°

Feels Like 70°

Humidity: 74%

UV Index: 3

Wind: 10 mph

3 PM

72°

Feels Like 68°

Humidity: 74%

UV Index: 3

Wind: 10 mph

4 PM

72°

Feels Like 72°

Humidity: 72%

UV Index: 3

Wind: 10 mph

5 PM

73°

Feels Like 72°

Humidity: 63%

UV Index: 2

Wind: 10 mph

6 PM

72°

Feels Like 72°

Humidity: 63%

UV Index: 1

Wind: 9 mph

7 PM

72°

Feels Like 70°

Humidity: 66%

UV Index: 1

Wind: 9 mph

8 PM

70°

Feels Like 68°

Humidity: 71%

UV Index: 0

Wind: 8 mph

9 PM

68°

Feels Like 63°

Humidity: 77%

UV Index: 0

Wind: 7 mph

10 PM

66°

Feels Like 64°

Humidity: 83%

UV Index: 0

Wind: 7 mph

11 PM

64°

Feels Like 63°

Humidity: 86%

UV Index: 0

Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

3 AM

29 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.46 µg/m³
PM₁₀: 4.72 µg/m³
O₃: 0.032 ppm
NO₂: 1.6 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

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

4 AM

29 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.96 µg/m³
PM₁₀: 5.22 µg/m³
O₃: 0.032 ppm
NO₂: 1.3 ppb
SO₂: 0.1 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:

PM_2.5: 5.09 µg/m³
PM₁₀: 5.34 µg/m³
O₃: 0.030 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.

6 AM

27 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.67 µg/m³
PM₁₀: 4.9 µg/m³
O₃: 0.029 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.

7 AM

24 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.25 µg/m³
PM₁₀: 4.47 µg/m³
O₃: 0.026 ppm
NO₂: 1.4 ppb
SO₂: 0 ppb
CO: 0.08 ppm

Health Recommendations:

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

8 AM

23 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.2 µg/m³
PM₁₀: 4.44 µg/m³
O₃: 0.025 ppm
NO₂: 1.8 ppb
SO₂: 0 ppb
CO: 0.09 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:

PM_2.5: 4.16 µg/m³
PM₁₀: 4.41 µg/m³
O₃: 0.024 ppm
NO₂: 1.9 ppb
SO₂: 0 ppb
CO: 0.10 ppm

Health Recommendations:

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

10 AM

33 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.53 µg/m³
PM₁₀: 3.73 µg/m³
O₃: 0.035 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.

11 AM

33 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.29 µg/m³
PM₁₀: 3.45 µg/m³
O₃: 0.036 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.

12 PM

33 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.07 µg/m³
PM₁₀: 3.2 µg/m³
O₃: 0.035 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.

1 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.53 µg/m³
PM₁₀: 2.63 µg/m³
O₃: 0.035 ppm
NO₂: 0.6 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

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.19 µg/m³
PM₁₀: 2.29 µg/m³
O₃: 0.035 ppm
NO₂: 0.7 ppb
SO₂: 0.3 ppb
CO: 0.08 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:

PM_2.5: 2.05 µg/m³
PM₁₀: 2.14 µg/m³
O₃: 0.035 ppm
NO₂: 0.9 ppb
SO₂: 0.4 ppb
CO: 0.08 ppm

Health Recommendations:

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

4 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.92 µg/m³
PM₁₀: 2.01 µg/m³
O₃: 0.035 ppm
NO₂: 1.1 ppb
SO₂: 0.4 ppb
CO: 0.08 ppm

Health Recommendations:

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

5 PM

31 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.84 µg/m³
PM₁₀: 1.92 µg/m³
O₃: 0.034 ppm
NO₂: 1.3 ppb
SO₂: 0.4 ppb
CO: 0.08 ppm

Health Recommendations:

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

6 PM

30 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.76 µg/m³
PM₁₀: 1.85 µg/m³
O₃: 0.032 ppm
NO₂: 1.3 ppb
SO₂: 0.4 ppb
CO: 0.08 ppm

Health Recommendations:

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

7 PM

25 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.76 µg/m³
PM₁₀: 1.86 µg/m³
O₃: 0.027 ppm
NO₂: 1.5 ppb
SO₂: 0.3 ppb
CO: 0.08 ppm

Health Recommendations:

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

8 PM

19 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.79 µg/m³
PM₁₀: 1.92 µg/m³
O₃: 0.021 ppm
NO₂: 2.1 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

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

9 PM

16 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.74 µg/m³
PM₁₀: 1.88 µg/m³
O₃: 0.017 ppm
NO₂: 2.3 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

13 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.69 µg/m³
PM₁₀: 1.85 µg/m³
O₃: 0.014 ppm
NO₂: 2.3 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

11 PM

12 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.67 µg/m³
PM₁₀: 1.82 µg/m³
O₃: 0.013 ppm
NO₂: 2.3 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Cheyenne

Severe Future Possible

Flood Watch

Flood Watch issued July 22 at 11:58PM MDT until July 24 at 12:00AM MDT by NWS Cheyenne WY

Jul 22, 11:58 PM → Jul 24, 12:00 AM

WHAT: Flooding caused by localized excessive thunderstorm
rainfall continues to be possible.

WHERE: Southeast Wyoming and the western Nebraska panhandle.

WHEN: Through Thursday evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

ADDITIONAL DETAILS:
- Localized torrential rainfall in scattered thunderstorm
activity combined with the potential for training
thunderstorms continues to have the potential to produce
flooding.
- http://www.weather.gov/safety/flood

+ Read More

Monitor later forecasts and be alert for possible Flash Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Updated: Jul 23, 1:12 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Cheyenne

Flood Watch

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