Powder River, WY Weather & Growing Conditions
Overnight
30°F
Mostly Cloudy
Mostly cloudy, with a low around 30. Southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Mostly Cloudy | 7 mph SW | 0% |
| Wednesday | 52°F | Mostly Cloudy | 5 to 10 mph NW | 0% |
| Wednesday Night | 29°F | Mostly Cloudy | 2 to 7 mph WNW | 0% |
| Thursday | 55°F | Mostly Sunny | 8 to 14 mph SW | 0% |
| Thursday Night | 30°F | Mostly Cloudy | 8 mph WSW | 1% |
| Friday | 51°F | Sunny | 7 to 12 mph W | 4% |
| Friday Night | 29°F | Mostly Clear | 8 to 12 mph WSW | 0% |
| Saturday | 55°F | Sunny | 7 to 12 mph WSW | 0% |
| Saturday Night | 31°F | Mostly Clear | 7 to 14 mph SW | 0% |
| Sunday | 61°F | Sunny | 14 to 21 mph SW | 0% |
| Sunday Night | 34°F | Partly Cloudy | 10 to 15 mph SW | 0% |
| Monday | 60°F | Mostly Sunny | 7 to 10 mph W | 0% |
| Monday Night | 34°F | Partly Cloudy | 7 to 13 mph W | 0% |
| Tuesday | 61°F | Mostly Sunny | 8 to 15 mph WSW | 0% |
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 (5.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.