Thermopolis, WY Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Thermopolis, WY in one place.
A slight chance of showers and thunderstorms between noon and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 84. South southwest wind 3 to 8 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Thermopolis, WY is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 17, 2026 8:23 AM MDT.
The active forecast window currently covers Sep 18 to Sep 23, 2026 for Thermopolis, WY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 18 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 8:23 AM MDT
- Forecast office
- RIW
- Source
- NOAA / NWS
Daily Outlook
This Week in Thermopolis
Friday looks like the warmest upcoming period in Thermopolis at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Saturday Night at about 1 to 12 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 8:23 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- RIW
- Radar station
- KRIW
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 50. Northwest wind 1 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms. Partly sunny, with a high near 71. North wind 1 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 44. Northwest wind 1 to 12 mph. Chance of precipitation is 80%.
A chance of rain showers before noon, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 70. North northwest wind 1 to 7 mph. Chance of precipitation is 40%.
Mostly clear, with a low around 44.
Sunny, with a high near 80.
Mostly clear, with a low around 47.
Sunny, with a high near 83.
Mostly clear, with a low around 48.
Sunny, with a high near 84.
Mostly clear, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Sep 18
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
3 to 8 mph
SSW
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms
|
50°F |
1 to 9 mph
NW
|
|
Saturday
Sep 19
|
Showers And Thunderstorms
|
71°F |
1 to 10 mph
N
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms
|
44°F |
1 to 12 mph
NW
|
|
Sunday
Sep 20
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
70°F |
1 to 7 mph
NNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
44°F |
1 to 5 mph
ESE
|
|
Monday
Sep 21
|
Sunny
|
80°F |
5 mph
S
|
|
Monday Night
Sep 21
|
Mostly Clear
|
47°F |
5 mph
SSE
|
|
Tuesday
Sep 22
|
Sunny
|
83°F |
6 mph
S
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
48°F |
5 mph
S
|
|
Wednesday
Sep 23
|
Sunny
|
84°F |
7 mph
SSE
|
|
Wednesday Night
Sep 23
|
Mostly Clear
|
49°F |
6 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Thermopolis.
Nearby forecast pages are not available for this location yet.
