Powder Horn, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Powder Horn, a community in Sheridan County, Wyoming.
This Afternoon
66°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 66, with temperatures falling to around 62 in the afternoon. Northwest wind around 6 mph. Chance of precipitation is 100%.
7-day forecast for Powder Horn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Showers And Thunderstorms | 6 mph NW | 96% |
| Tonight | 47°F | Showers And Thunderstorms then Areas Of Fog | 1 to 6 mph NW | 79% |
| Sunday | 63°F | Showers And Thunderstorms | 2 to 10 mph NW | 80% |
| Sunday Night | 45°F | Showers And Thunderstorms Likely then Areas Of Fog | 0 to 5 mph NNW | 56% |
| Monday | 70°F | Areas Of Fog then Slight Chance Rain Showers | 0 to 5 mph NE | 15% |
| Monday Night | 44°F | Mostly Clear | 6 mph S | 0% |
| Tuesday | 78°F | Sunny | 0 to 5 mph ENE | 2% |
| Tuesday Night | 50°F | Partly Cloudy | 1 to 6 mph SSW | 13% |
| Wednesday | 78°F | Chance Rain Showers | 5 mph W | 26% |
| Wednesday Night | 49°F | Mostly Clear | 1 to 6 mph WSW | 4% |
| Thursday | 83°F | Sunny | 2 to 8 mph SE | 5% |
| Thursday Night | 51°F | Mostly Clear | 5 to 10 mph S | 1% |
| Friday | 83°F | Sunny | 6 mph SSE | 2% |
| Friday Night | 52°F | Partly Cloudy | 3 to 9 mph SSW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Powder Horn (44.691, -106.973). Updated through the day.
Growing snapshot for Powder Horn
Last spring frost
May 24
First fall frost
Sep 23
Growing season
120 days
Hardiness zone
5a
More local growing data for Powder Horn: nearby ZIP 82842 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Story, Wy (1.7 mi from Powder Horn). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.