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

Wet and Cool in the East this Memorial Day Weekend; Well Above Normal Temperatures in the Northern Plains

A wet Memorial Day weekend is in store for the East, with widespread rainfall of 1 to more than 2 inches expected from the Gulf Coast to southern New England. Well above normal temperatures are forecast to build across the northern Plains. Another round of heavy to excessive rainfall is expected to impact the western Gulf Coast this weekend with Flood Watches in effect. Read More >

Current conditions at

CW8386 Thermopolis (C8386)

Lat: 43.64283°NLon: 108.227°WElev: 4419.52ft.

NA

51°F

11°C

Humidity 51%
Wind Speed N 0 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 33°F (1°C)
Visibility NA
Last update 24 May 12:41 AM MDT
Extended Forecast for

Thermopolis WY

  • Overnight

    Overnight: Mostly clear, with a low around 46. South wind around 5 mph.

    Low: 46 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 83. South southeast wind 5 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Sunny, with a high near 88. South wind 3 to 8 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. South wind 5 to 9 mph.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 53. Breezy, with a south wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 50. Chance of precipitation is 40%.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 46. South wind around 5 mph.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 83. South southeast wind 5 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 50. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Memorial Day
Sunny, with a high near 88. South wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 52. South wind 5 to 9 mph.
Tuesday
A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 53. Breezy, with a south wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 40%.
Wednesday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 50. Chance of precipitation is 40%.
Thursday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 50.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 84.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 49. Breezy.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thermopolis WY
 43.66°N 108.2°W (Elev. 4360 ft)
Last Update:
11:31 pm MDT May 23, 2026
Forecast Valid:
12am MDT May 24, 2026-6pm MDT May 30, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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