Powder River, WY Weather & Growing Conditions
Today
72°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Mostly sunny. High near 72, with temperatures falling to around 69 in the afternoon. West southwest wind 5 to 9 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph WSW | 34% |
| Tonight | 44°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 to 10 mph NW | 84% |
| Sunday | 61°F | Showers And Thunderstorms Likely | 9 to 14 mph WNW | 58% |
| Sunday Night | 40°F | Mostly Cloudy | 2 to 8 mph NW | 10% |
| Monday | 67°F | Mostly Sunny | 5 mph SSW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 to 8 mph SE | 0% |
| Tuesday | 76°F | Sunny | 6 to 10 mph SSW | 1% |
| Tuesday Night | 47°F | Slight Chance Showers And Thunderstorms | 7 mph S | 17% |
| Wednesday | 76°F | Mostly Sunny | 13 to 18 mph SW | 8% |
| Wednesday Night | 45°F | Mostly Clear | 8 mph WSW | 3% |
| Thursday | 78°F | Sunny | 9 mph SW | 2% |
| Thursday Night | 48°F | Partly Cloudy | 6 mph SSE | 1% |
| Friday | 79°F | Mostly Sunny | 9 to 14 mph SSW | 2% |
| Friday Night | 49°F | Partly Cloudy | 13 mph SSW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Powder River, WY
Last spring frost
May 23
First fall frost
Sep 20
Growing season
121 days
Hardiness zone
5a
Explore more for Powder River, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Powder River #2, Wy (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.