Hourly Weather Forecast for Casper, Wyoming

Hourly Weather | Today › Tuesday, April 7, 2026

Active Weather Warnings

High Wind Warning
Red Flag Warning

Casper, Wyoming

10 AM

46°

Feels Like 39°

Humidity: 49%

UV Index: 4

Wind: 18 mph

11 AM

54°

Feels Like 48°

Humidity: 36%

UV Index: 4

Wind: 21 mph

12 PM

61°

Feels Like 57°

Humidity: 27%

UV Index: 5

Wind: 23 mph

1 PM

68°

Feels Like 66°

Humidity: 19%

UV Index: 5

Wind: 24 mph

2 PM

70°

Feels Like 70°

Humidity: 16%

UV Index: 5

Wind: 22 mph

3 PM

70°

Feels Like 70°

Humidity: 15%

UV Index: 4

Wind: 22 mph

4 PM

72°

Feels Like 70°

Humidity: 14%

UV Index: 3

Wind: 22 mph

5 PM

72°

Feels Like 70°

Humidity: 13%

UV Index: 2

Wind: 23 mph

6 PM

70°

Feels Like 64°

Humidity: 15%

UV Index: 1

Wind: 23 mph

7 PM

66°

Feels Like 63°

Humidity: 17%

UV Index: 0

Wind: 20 mph

8 PM

63°

Feels Like 57°

Humidity: 22%

UV Index: 0

Wind: 18 mph

9 PM

59°

Feels Like 54°

Humidity: 27%

UV Index: 0

Wind: 16 mph

10 PM

55°

Feels Like 48°

Humidity: 32%

UV Index: 0

Wind: 16 mph

11 PM

54°

Feels Like 46°

Humidity: 36%

UV Index: 0

Wind: 17 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.85 µg/m³
PM₁₀: 3.71 µg/m³
O₃: 0.034 ppm
NO₂: 1.2 ppb
SO₂: 0.1 ppb
CO: 0.13 ppm

Health Recommendations:

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

11 AM

35 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.38 µg/m³
PM₁₀: 4.52 µg/m³
O₃: 0.038 ppm
NO₂: 0.9 ppb
SO₂: 0.1 ppb
CO: 0.12 ppm

Health Recommendations:

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

12 PM

39 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.65 µg/m³
PM₁₀: 4.86 µg/m³
O₃: 0.042 ppm
NO₂: 0.6 ppb
SO₂: 0.2 ppb
CO: 0.11 ppm

Health Recommendations:

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

1 PM

45 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.17 µg/m³
PM₁₀: 2.48 µg/m³
O₃: 0.049 ppm
NO₂: 0.1 ppb
SO₂: 0.2 ppb
CO: 0.10 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:

PM_2.5: 0.81 µg/m³
PM₁₀: 1.56 µg/m³
O₃: 0.049 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

3 PM

45 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.72 µg/m³
PM₁₀: 1.33 µg/m³
O₃: 0.049 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.09 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:

PM_2.5: 0.73 µg/m³
PM₁₀: 1.32 µg/m³
O₃: 0.049 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

5 PM

45 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.7 µg/m³
PM₁₀: 1.27 µg/m³
O₃: 0.049 ppm
NO₂: 0.1 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

6 PM

44 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.6 µg/m³
PM₁₀: 1.06 µg/m³
O₃: 0.048 ppm
NO₂: 0.2 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

7 PM

44 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.53 µg/m³
PM₁₀: 0.95 µg/m³
O₃: 0.047 ppm
NO₂: 0.3 ppb
SO₂: 0.1 ppb
CO: 0.09 ppm

Health Recommendations:

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

8 PM

43 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.53 µg/m³
PM₁₀: 1.08 µg/m³
O₃: 0.046 ppm
NO₂: 0.4 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

43 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.58 µg/m³
PM₁₀: 1.34 µg/m³
O₃: 0.046 ppm
NO₂: 0.4 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

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

10 PM

42 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.67 µg/m³
PM₁₀: 1.65 µg/m³
O₃: 0.045 ppm
NO₂: 0.4 ppb
SO₂: 0.2 ppb
CO: 0.09 ppm

Health Recommendations:

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

11 PM

42 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 0.74 µg/m³
PM₁₀: 1.9 µg/m³
O₃: 0.045 ppm
NO₂: 0.4 ppb
SO₂: 0.2 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 Casper

Severe Expected Likely

Red Flag Warning

Red Flag Warning issued April 7 at 12:47AM MDT until April 7 at 9:00PM MDT by NWS Riverton WY

Apr 7, 12:00 PM → Apr 7, 9:00 PM

The National Weather Service in Riverton has issued a Red Flag
Warning, which is in effect from noon today to 9 PM MDT this
evening.

* IMPACTS: Low Humidities and Strong Gusty Winds could cause
erratic fire behavior.

* AFFECTED AREA:
In Central WY Fire Zones...280...283...289.
In North Central WY Fire Zone....281.

* COUNTIES AFFECTED:
In Central WY...Fremont...Natrona.
In North Central WY...Johnson.
In Southwest WY...Sweetwater.

* WIND: West 20 to 30 mph with gusts up to 40 to 50 mph.

* HUMIDITY: As low as 13 to 16 percent.

+ Read More

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

Updated: Apr 7, 9:24 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Casper

Red Flag Warning

Explore U.S. Weather Trends