Today | Weather | Thursday, February 26, 2026

Active Weather Warnings

Weather in Cheyenne, Wyoming

12:32 AM

Now

43° F

Feels Like 27°

Precipitation 0 %

Wind 27 mph

Humidity 41 %

Today

Day 55°

Night 39°

Precipitation 3 %

Wind 24 mph

UV Index (0 - 11+) 4

Warning: Strong Winds Today: 24 mph

Cheyenne Weather Forecast Updated

14 minutes ago

Last updated on February 26, 2026 at 12:18 AM

Air Quality in Cheyenne

NOW

27 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 0.5 µg/m³

PM₁₀ 0.5 µg/m³

O₃ 0.029 ppm

NO₂ 0.5 ppb

SO₂ 0.4 ppb

CO 0.08 ppm

NH₃ 0.05 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 0.5 µg/m³

PM₁₀ – 0.5 µg/m³

O₃ – 56.84 µg/m³

NO₂ – 0.9 µg/m³

SO₂ – 1.04 µg/m³

CO – 89.85 µg/m³

NH₃ – 0.05 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Cheyenne

Severe Future Possible

Fire Weather Watch

Fire Weather Watch issued February 25 at 12:16AM MST until February 26 at 6:00PM MST by NWS Cheyenne WY

Feb 26, 11:00 AM → Feb 26, 6:00 PM

The National Weather Service in Cheyenne has issued a Fire
Weather Watch, which is in effect from Thursday morning through
Thursday afternoon.

* AFFECTED AREA...Fire weather zones 430, 431, 432, 433, 435,
436, and 437.

* WIND...Westerly to northwesterly winds 20 to 30 MPH with gusts
up to 45 MPH.

* HUMIDITY...15 to 20 percent.

* HIGHEST THREAT...is located along the Interstate 80 corridor
east of the Laramie Range into the southern Nebraska Panhandle,
from about Kimball to Sidney.

IMPACTS: Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

+ Read More

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Updated: Feb 25, 12:28 PM Source: NWS Alert

Severe Expected Likely

Red Flag Warning

Red Flag Warning issued February 25 at 12:31PM MST until February 27 at 6:00PM MST by NWS Cheyenne WY

Feb 26, 11:00 AM → Feb 27, 6:00 PM

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 11 AM Thursday to 6 PM MST
Friday. The Fire Weather Watch has been upgraded.

* AFFECTED AREA...Fire weather zones 430, 431, 432, 433, 435,
436, and 437.

* WIND...West to northwest winds 20 to 25 MPH with gusts up to 35
MPH on Thursday. Stronger winds expected on Friday with gusts
over 45 MPH possible.

* HUMIDITY...10 to 20 percent, with the lowest relative humidity
expected Friday. Poor overnight humidity recoveries are expected
Thursday night.

* HIGHEST THREAT...The most critical fire weather conditions are
expected along the Interstate 80 corridor east of the Laramie
Range into the southern Nebraska Panhandle. The driest
conditions are expected here with some of the strongest winds.

IMPACTS: Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

+ 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: Feb 26, 12:18 AM Source: NWS Alert