Ranchester, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ranchester, a town in Sheridan County, Wyoming.
Tonight
46°F
Patchy Fog
Patchy fog and showers and thunderstorms. Mostly cloudy, with a low around 46. West northwest wind 6 to 9 mph. Chance of precipitation is 80%.
7-day forecast for Ranchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Patchy Fog | 6 to 9 mph WNW | 77% |
| Sunday | 62°F | Showers And Thunderstorms | 7 to 12 mph NW | 76% |
| Sunday Night | 44°F | Chance Rain Showers then Areas Of Fog | 0 to 5 mph NNW | 54% |
| Monday | 69°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph E | 8% |
| Monday Night | 43°F | Mostly Clear then Patchy Fog | 1 to 5 mph SSE | 0% |
| Tuesday | 77°F | Sunny | 0 to 3 mph SE | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 3 mph S | 10% |
| Wednesday | 78°F | Slight Chance Rain Showers | 3 mph WNW | 20% |
| Wednesday Night | 48°F | Mostly Clear | 2 mph WSW | 4% |
| Thursday | 83°F | Sunny | 1 to 6 mph S | 3% |
| Thursday Night | 49°F | Mostly Clear | 2 to 6 mph S | 1% |
| Friday | 83°F | Sunny | 2 mph SE | 1% |
| Friday Night | 50°F | Partly Cloudy | 5 mph SSW | 3% |
| Saturday | 76°F | Mostly Sunny then Slight Chance Rain Showers | 6 mph WNW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Ranchester (44.908, -107.167). Updated through the day.
Growing snapshot for Ranchester
Last spring frost
May 24
First fall frost
Sep 18
Growing season
114 days
Hardiness zone
5a
More local growing data for Ranchester: nearby ZIP 82839 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dayton, Wy (7.3 mi from Ranchester). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.