Rock River, WY Weather & Growing Conditions
Today
76°F
Areas Of Smoke then Sunny
Areas of smoke before noon. Sunny, with a high near 76. East southeast wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Areas Of Smoke then Sunny | 10 to 15 mph ESE | 1% |
| Tonight | 47°F | Mostly Clear | 5 to 20 mph SSE | 2% |
| Wednesday | 82°F | Sunny | 5 to 15 mph NW | 3% |
| Wednesday Night | 50°F | Mostly Clear | 10 to 15 mph SSW | 0% |
| Thursday | 86°F | Sunny | 5 to 15 mph W | 2% |
| Thursday Night | 54°F | Mostly Clear | 5 to 15 mph SW | 0% |
| Friday | 89°F | Sunny | 5 to 15 mph WSW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 15 mph SW | 0% |
| Saturday | 91°F | Sunny | 10 to 15 mph W | 0% |
| Saturday Night | 58°F | Partly Cloudy | 5 to 15 mph S | 0% |
| Sunday | 91°F | Sunny | 10 to 15 mph WSW | 7% |
| Sunday Night | 59°F | Partly Cloudy | 5 to 15 mph WSW | 7% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 15 mph WSW | 22% |
| Monday Night | 57°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 15 mph S | 20% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock River, WY
Last spring frost
May 22
First fall frost
Sep 24
Growing season
125 days
Hardiness zone
4a
Explore more for Rock River, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Sybille Rsch Unit, Wy (18 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.