Greybull, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greybull, a town in Big Horn County, Wyoming.
Today
53°F
Sunny
Sunny. High near 53, with temperatures falling to around 50 in the afternoon. West southwest wind around 2 mph.
7-day forecast for Greybull
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 53°F | Sunny | 2 mph WSW | 0% |
| Tonight | 27°F | Partly Cloudy | 2 mph SSE | 0% |
| Thursday | 56°F | Sunny | 1 to 5 mph SSE | 0% |
| Thursday Night | 30°F | Mostly Cloudy | 3 mph NW | 11% |
| Friday | 54°F | Sunny | 1 to 5 mph S | 11% |
| Friday Night | 27°F | Mostly Clear | 3 mph SE | 0% |
| Saturday | 56°F | Sunny | 3 mph SE | 0% |
| Saturday Night | 30°F | Mostly Clear | 6 mph SE | 0% |
| Sunday | 62°F | Sunny | 2 to 8 mph SSE | 0% |
| Sunday Night | 33°F | Partly Cloudy | 2 mph SSW | 0% |
| Monday | 61°F | Mostly Sunny | 2 mph W | 0% |
| Monday Night | 33°F | Partly Cloudy | 2 mph SE | 0% |
| Tuesday | 60°F | Mostly Sunny | 2 mph ENE | 0% |
| Tuesday Night | 32°F | Partly Cloudy | 1 mph SSE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Greybull (44.487, -108.056). Updated through the day.
Growing snapshot for Greybull
Last spring frost
May 11
First fall frost
Sep 23
Growing season
133 days
Hardiness zone
4b
More local growing data for Greybull: nearby ZIP 82426 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Greybull, Wy (2.1 mi from Greybull). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.