National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

Casper, Natrona County International Airport (KCPR)

Lat: 42.8975°NLon: 106.47306°WElev: 5348.0ft.

Clear

39°F

4°C

Humidity 38%
Wind Speed W 13 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 07 Dec 01:20 PM MST
Extended Forecast for

Casper WY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 40. Breezy, with a west wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 40 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 35. Windy, with a southwest wind 17 to 25 mph, with gusts as high as 36 mph.

    Low: 35 °F

    Partly Cloudy
    and Windy

  • Monday

    Monday: Sunny, with a high near 45. Windy, with a southwest wind 20 to 25 mph, with gusts as high as 36 mph.

    High: 45 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: Increasing clouds, with a low around 34. Very windy, with a southwest wind 24 to 29 mph increasing to 34 to 39 mph after midnight. Winds could gust as high as 55 mph.

    Low: 34 °F

    Increasing
    Clouds and
    Very Windy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. Very windy, with a southwest wind 36 to 41 mph decreasing to 24 to 29 mph in the afternoon. Winds could gust as high as 55 mph.

    High: 52 °F

    Mostly Cloudy
    and Very
    Windy

  • Tuesday Night

    Tuesday Night: A chance of rain showers before 11pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 30. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: A chance of rain and snow showers before 11am, then a chance of rain showers. Mostly cloudy, with a high near 52. Windy, with a west southwest wind 22 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.

    High: 52 °F

    Windy. Chance
    Rain/Snow
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of rain showers before 11pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 28. Breezy. Chance of precipitation is 50%.

    Low: 28 °F

    Chance
    Rain/Snow and
    Breezy

  • Thursday

    Thursday: A chance of rain and snow showers before 11am, then a chance of snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.

    High: 38 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 40. Breezy, with a west wind 13 to 16 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a steady temperature around 35. Windy, with a southwest wind 17 to 25 mph, with gusts as high as 36 mph.
Monday
Sunny, with a high near 45. Windy, with a southwest wind 20 to 25 mph, with gusts as high as 36 mph.
Monday Night
Increasing clouds, with a low around 34. Very windy, with a southwest wind 24 to 29 mph increasing to 34 to 39 mph after midnight. Winds could gust as high as 55 mph.
Tuesday
Mostly cloudy, with a high near 52. Very windy, with a southwest wind 36 to 41 mph decreasing to 24 to 29 mph in the afternoon. Winds could gust as high as 55 mph.
Tuesday Night
A chance of rain showers before 11pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 30. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Wednesday
A chance of rain and snow showers before 11am, then a chance of rain showers. Mostly cloudy, with a high near 52. Windy, with a west southwest wind 22 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of rain showers before 11pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 28. Breezy. Chance of precipitation is 50%.
Thursday
A chance of rain and snow showers before 11am, then a chance of snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of snow showers. Mostly cloudy, with a low around 18.
Friday
Mostly cloudy, with a high near 35.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Casper WY
 42.83°N 106.31°W (Elev. 5312 ft)
Last Update:
11:47 am MST Dec 7, 2025
Forecast Valid:
1pm MST Dec 7, 2025-6pm MST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation