Greybull, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greybull, a town in Big Horn County, Wyoming.
Overnight
52°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 52. West northwest wind around 3 mph.
7-day forecast for Greybull
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Areas Of Smoke | 3 mph WNW | 0% |
| Tuesday | 81°F | Areas Of Smoke | 1 to 6 mph WSW | 0% |
| Tuesday Night | 52°F | Smoke | 1 to 10 mph NW | 4% |
| Wednesday | 88°F | Sunny | 0 to 5 mph SSE | 0% |
| Wednesday Night | 55°F | Mostly Clear | 1 to 7 mph NE | 0% |
| Thursday | 95°F | Sunny | 1 to 5 mph SE | 0% |
| Thursday Night | 59°F | Mostly Clear | 1 to 7 mph N | 0% |
| Friday | 99°F | Sunny | 1 to 5 mph SE | 0% |
| Friday Night | 62°F | Mostly Clear | 5 to 8 mph N | 0% |
| Saturday | 99°F | Sunny | 5 mph N | 0% |
| Saturday Night | 62°F | Mostly Clear | 3 to 7 mph N | 0% |
| Sunday | 98°F | Sunny | 3 mph NW | 2% |
| Sunday Night | 62°F | Partly Cloudy | 7 mph NNW | 1% |
| Monday | 97°F | Sunny | 3 mph NW | 2% |
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 Aug 4, 2026.