Greybull, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greybull, a town in Big Horn County, Wyoming.
This Afternoon
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny. High near 83, with temperatures falling to around 79 in the afternoon. South wind 2 to 6 mph. Chance of precipitation is 50%.
7-day forecast for Greybull
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 45% |
| Tonight | 52°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 9 mph NW | 66% |
| Saturday | 69°F | Patchy Fog then Chance Showers And Thunderstorms | 2 to 16 mph NW | 62% |
| Saturday Night | 46°F | Showers And Thunderstorms Likely | 6 to 18 mph NW | 65% |
| Sunday | 66°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 7 mph NW | 45% |
| Sunday Night | 44°F | Mostly Cloudy | 1 to 7 mph WNW | 5% |
| Monday | 74°F | Mostly Sunny | 3 mph SE | 0% |
| Monday Night | 46°F | Mostly Clear | 2 mph E | 0% |
| Tuesday | 79°F | Mostly Sunny | 2 mph SSE | 0% |
| Tuesday Night | 49°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 2 mph E | 12% |
| Wednesday | 80°F | Mostly Sunny | 2 mph SSE | 6% |
| Wednesday Night | 49°F | Mostly Clear | 3 mph E | 4% |
| Thursday | 82°F | Sunny | 1 to 5 mph SSE | 3% |
| Thursday Night | 50°F | Partly Cloudy | 6 mph ESE | 1% |
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 Sep 18, 2026.