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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Casper, Natrona County International Airport (KCPR)

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

Partly Cloudy

72°F

22°C

Humidity 37%
Wind Speed WSW 19 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 19 Sep 12:00 PM MDT
Extended Forecast for

Casper WY

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 72. West southwest wind around 8 mph.

    High: 72 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 45. Light and variable wind becoming west 5 to 7 mph after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before noon, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 63. West wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms between 7pm and 9pm. Mostly cloudy, with a low around 41. Northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 10%.

    Low: 41 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69. Calm wind becoming west around 5 mph.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. Light and variable wind becoming east southeast 5 to 8 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Breezy.

    High: 77 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 72. West southwest wind around 8 mph.
Tonight
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 45. Light and variable wind becoming west 5 to 7 mph after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely, mainly before noon, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 63. West wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A slight chance of showers and thunderstorms between 7pm and 9pm. Mostly cloudy, with a low around 41. Northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 10%.
Monday
Mostly sunny, with a high near 69. Calm wind becoming west around 5 mph.
Monday Night
Mostly clear, with a low around 42. Light and variable wind becoming east southeast 5 to 8 mph.
Tuesday
Sunny, with a high near 77. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Tuesday Night
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 77. Breezy.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Casper WY
 42.83°N 106.34°W (Elev. 5236 ft)
Last Update:
11:01 am MDT Sep 19, 2026
Forecast Valid:
12pm MDT Sep 19, 2026-6pm MDT Sep 25, 2026
 
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