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Casper, WY weather, straight from the source.

Current conditions, official National Weather Service forecasts and alerts, rain timing, local radar, air quality, wind, humidity, sunrise, sunset, and the latest reported update for Casper, WY. Always follow local warnings and emergency instructions.

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Weather status

Red Flag Warning

Red Flag Warning issued September 9 at 2:08AM MDT until September 10 at 9:00PM MDT by NWS Riverton WY Expires Thu, 9:00 PM MDT.

View alert detailsOfficial NWS ↗
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes

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Animated Multi-Radar/Multi-Sensor reflectivity from the National Weather Service’s network of Doppler radars. Search a U.S. city, ZIP code, or street address to center the map on local weather, then zoom to neighborhood street detail.

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Doppler radar and warnings: NOAA/National Weather Service · Map: OpenFreeMap, OpenMapTiles and OpenStreetMap contributors. Radar can be delayed briefly during service updates.

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What’s next

Hourly forecast

⌖ Casper, WY

Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Casper, WY. Forecasts and alerts update from NOAA and the National Weather Service.

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64°Sunny0% rain
68°Sunny0% rain
72°Sunny0% rain
73°Sunny0% rain
75°Sunny0% rain
77°Sunny0% rain
77°Sunny0% rain

Next 24 hours

Rain Timeline

No rain expected

No meaningful precipitation is expected in the official hourly forecast.

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Official NWS outlook

7-Day Forecast

High / low temperatures

Today

! NWS
80°50°

Sunny

Precipitation
0%
Wind
W 2 to 14 mph
Sunrise
6:39 AM
Sunset
7:28 PM

Thu

85°56°

Sunny

Precipitation
0%
Wind
SW 5 to 22 mph
Sunrise
6:40 AM
Sunset
7:26 PM

Fri

81°47°

Mostly Sunny

Precipitation
8%
Wind
W 15 to 22 mph
Sunrise
6:42 AM
Sunset
7:24 PM

Sat

80°53°

Chance Showers And Thunderstorms

Precipitation
58%
Wind
SSE 3 to 12 mph
Sunrise
6:43 AM
Sunset
7:22 PM

Sun

76°44°

Chance Showers And Thunderstorms

Precipitation
34%
Wind
WSW 15 to 26 mph
Sunrise
6:44 AM
Sunset
7:21 PM

Mon

70°42°

Sunny

Precipitation
6%
Wind
WSW 17 to 21 mph
Sunrise
6:45 AM
Sunset
7:19 PM

Tue

77°49°

Sunny

Precipitation
6%
Wind
SW 5 to 12 mph
Sunrise
6:46 AM
Sunset
7:17 PM

Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.

Weather guidance for your areaPlan with the complete forecast

Use current official weather information for Casper, WY before making weather-sensitive plans.

Safety guides

Weather for a healthier day

Healthy Weather

Real Feel54°F
Walking is not recommended now

Review the active Red Flag Warning before going outside. MyUSA.us will not recommend this activity while an NWS watch, warning, or emergency is active.

WindCalm0 mph
Best walk timeReview the active Red Flag Warning before leaving

MyUSA.us will not recommend an outing window while an NWS watch, warning, or emergency is active. Follow the official alert and local instructions.

Official EPA AirNowLocal air qualityCasper, WY
View AQI +
Full air-quality page →AirNow details ↗Smoke and fire map ↗
More weather details
Wind gustsNot reported
Rain now0%next hour
Humidity50%current
UV indexCheckingEPA forecast

Wind impact: Light wind with little expected outdoor impact.

Full Healthy Weather guides and reminders →

“Better weather window” is planning guidance based on official NWS data—not a promise of safe conditions. Review active alerts and radar before leaving.

Storm & DetailsGusts, pressure, visibility and official risk outlooksView details +
Wind gustNot reported
Pressure—
Visibility10.0 mi
Peak rain chance0%
Dew point36°F
Active alerts1

Official risk outlooks

These national tools add expert storm, heavy-rain and flooding context to your local forecast.

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Official tropical weather

Hurricane center

NOAA National Hurricane Center updates, outlooks, and storm resources in one place.

Simple, useful help

Weather safety guides

Quick answers for heat, storms, flooding and hurricane preparation—kept separate so your main weather page stays clean.

View all guides →

Hot weather

Heat and sun safety

Plan outdoor time and recognize dangerous heat.

Severe weather

Storms and lightning

Know when to move indoors and where to shelter.

Travel safety

Flooding and driving

Avoid flooded roads and prepare before a trip.

Stay weather-ready

Active NWS alerts

Weather safety ↗

Severe · Expected

Red Flag Warning

Applies to: Natrona County/Casper BLM; Granite/Green/Ferris/Rattlesnake Mountains; Casper MountainIssued by: NWS Riverton WYRed Flag Warning issued September 9 at 2:08AM MDT until September 10 at 9:00PM MDT by NWS Riverton WY
Alert details* IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 10 to 15 mph with gusts up to 25 mph. Thursday, west to southwest 15 to 20 mph with gusts up to 40 mph. * HUMIDITY: As low as 8 percent. Thursday, as low as 6 percent. RH recovery will be poor tonight.
Safety instructionsA 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.
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