Thermopolis, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermopolis, a town in Hot Springs County, Wyoming.
Today
82°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 82. North northeast wind 1 to 10 mph.
7-day forecast for Thermopolis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Areas Of Smoke | 1 to 10 mph NNE | 0% |
| Tonight | 55°F | Areas Of Smoke | 2 to 12 mph NW | 2% |
| Wednesday | 88°F | Sunny | 1 to 10 mph SSE | 0% |
| Wednesday Night | 58°F | Mostly Clear | 2 to 14 mph NW | 0% |
| Thursday | 95°F | Sunny | 2 to 9 mph SSE | 0% |
| Thursday Night | 62°F | Mostly Clear | 2 to 9 mph W | 0% |
| Friday | 99°F | Sunny | 2 to 9 mph W | 0% |
| Friday Night | 65°F | Mostly Clear | 12 mph WNW | 0% |
| Saturday | 98°F | Sunny | 6 to 10 mph NW | 0% |
| Saturday Night | 65°F | Mostly Clear | 8 mph WNW | 0% |
| Sunday | 98°F | Sunny | 5 to 9 mph WNW | 4% |
| Sunday Night | 64°F | Partly Cloudy | 6 to 9 mph WNW | 0% |
| Monday | 97°F | Sunny | 5 to 9 mph NNW | 4% |
| Monday Night | 63°F | Partly Cloudy | 5 to 10 mph NW | 6% |
Forecast source: National Weather Service (api.weather.gov) for Thermopolis (43.648, -108.215). Updated through the day.
Growing snapshot for Thermopolis
Last spring frost
May 24
First fall frost
Sep 16
Growing season
112 days
Hardiness zone
4b
More local growing data for Thermopolis: nearby ZIP 82430 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Thermopolis 9Ne, Wy (4 mi from Thermopolis). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.