Rock River, WY Weather & Growing Conditions
This Afternoon
44°F
Sunny
Sunny. High near 44, with temperatures falling to around 38 in the afternoon. West northwest wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Sunny | 10 to 15 mph WNW | 1% |
| Tonight | 28°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Wednesday | 47°F | Mostly Cloudy | 0 to 5 mph ESE | 1% |
| Wednesday Night | 27°F | Mostly Cloudy | 0 to 5 mph WNW | 1% |
| Thursday | 53°F | Sunny | 5 mph W | 0% |
| Thursday Night | 30°F | Partly Cloudy | 5 mph WSW | 0% |
| Friday | 51°F | Mostly Sunny | 5 to 15 mph W | 1% |
| Friday Night | 29°F | Mostly Clear | 10 mph WSW | 3% |
| Saturday | 53°F | Sunny | 5 to 15 mph W | 3% |
| Saturday Night | 30°F | Mostly Clear | 5 mph WSW | 0% |
| Sunday | 62°F | Sunny | 5 to 15 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 10 to 15 mph W | 0% |
| Monday | 61°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Monday Night | 36°F | Partly Cloudy | 5 mph SW | 0% |
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 Nov 4, 2026.