Rock River, WY Weather & Growing Conditions
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. Southwest wind 0 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 0 to 10 mph SW | 14% |
| Saturday | 67°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 10 mph WSW | 21% |
| Saturday Night | 42°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph WSW | 27% |
| Sunday | 62°F | Partly Sunny | 5 to 15 mph W | 2% |
| Sunday Night | 39°F | Partly Cloudy | 0 to 10 mph W | 3% |
| Monday | 68°F | Sunny | 0 to 5 mph W | 1% |
| Monday Night | 43°F | Mostly Clear | 5 to 10 mph SE | 0% |
| Tuesday | 73°F | Sunny | 0 to 5 mph WSW | 7% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph SSW | 13% |
| Wednesday | 72°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph W | 23% |
| Wednesday Night | 46°F | Partly Cloudy | 0 to 10 mph WSW | 4% |
| Thursday | 73°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Thursday Night | 47°F | Partly Cloudy | 5 mph SSE | 12% |
| Friday | 76°F | Mostly Sunny | 5 mph WSW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock River, WY
Last spring frost
Jun 1
First fall frost
Sep 8
Growing season
97 days
Hardiness zone
4b
Explore more for Rock River, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Medicine Bow, Wy (16.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.