Rock River, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock River, a town in Albany County, Wyoming.
This Afternoon
75°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 75, with temperatures falling to around 65 in the afternoon. Northeast wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Rock River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Chance Showers And Thunderstorms | 10 mph NE | 30% |
| Tonight | 48°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph SSW | 30% |
| Saturday | 68°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 10 mph WSW | 20% |
| Saturday Night | 42°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph SW | 29% |
| 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 | 74°F | Sunny | 0 to 5 mph WSW | 7% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph SSW | 14% |
| Wednesday | 72°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph W | 22% |
| Wednesday Night | 45°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% |
Forecast source: National Weather Service (api.weather.gov) for Rock River (41.732, -105.975). Updated through the day.
Growing snapshot for Rock River
Last spring frost
Jun 1
First fall frost
Sep 8
Growing season
97 days
Hardiness zone
4b
More local growing data for Rock River: nearby ZIP 82083 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Medicine Bow, Wy (16.3 mi from Rock River). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.