Powder Horn, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Powder Horn, a community in Sheridan County, Wyoming.
Today
64°F
Isolated Showers And Thunderstorms then Showers And Thunderstorms
Isolated showers and thunderstorms before 9am, then showers and thunderstorms. Mostly cloudy. High near 64, with temperatures falling to around 61 in the afternoon. Northwest wind 3 to 7 mph. Chance of precipitation is 90%.
7-day forecast for Powder Horn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Isolated Showers And Thunderstorms then Showers And Thunderstorms | 3 to 7 mph NW | 85% |
| Tonight | 46°F | Patchy Fog | 1 to 8 mph WNW | 86% |
| Sunday | 63°F | Showers And Thunderstorms | 1 to 7 mph NW | 75% |
| Sunday Night | 43°F | Chance Rain Showers then Areas Of Fog | 0 to 5 mph NNW | 40% |
| Monday | 71°F | Mostly Sunny | 0 to 6 mph NE | 14% |
| Monday Night | 45°F | Mostly Clear | 6 mph S | 1% |
| Tuesday | 78°F | Sunny | 0 to 5 mph NNE | 2% |
| Tuesday Night | 49°F | Mostly Clear then Slight Chance Rain Showers | 1 to 5 mph S | 16% |
| Wednesday | 79°F | Mostly Sunny | 5 mph NW | 14% |
| Wednesday Night | 49°F | Mostly Clear | 2 to 6 mph SSW | 6% |
| Thursday | 83°F | Sunny | 6 mph SE | 2% |
| Thursday Night | 50°F | Mostly Clear | 5 to 9 mph S | 1% |
| Friday | 83°F | Mostly Sunny | 5 mph SSE | 5% |
| Friday Night | 50°F | Partly Cloudy | 2 to 8 mph SSW | 10% |
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.