Rock Springs, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock Springs, a city in Sweetwater County, Wyoming.
Today
46°F
Cloudy
Cloudy. High near 46, with temperatures falling to around 43 in the afternoon. East northeast wind 2 to 9 mph.
7-day forecast for Rock Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Cloudy | 2 to 9 mph ENE | 10% |
| Tonight | 26°F | Partly Cloudy | 1 to 5 mph NNW | 2% |
| Thursday | 48°F | Mostly Sunny | 3 mph WSW | 0% |
| Thursday Night | 29°F | Mostly Cloudy | 5 mph WSW | 4% |
| Friday | 48°F | Sunny | 3 to 10 mph W | 4% |
| Friday Night | 27°F | Mostly Clear | 6 mph WSW | 0% |
| Saturday | 51°F | Sunny | 1 to 5 mph WSW | 0% |
| Saturday Night | 29°F | Mostly Clear | 1 mph SW | 0% |
| Sunday | 56°F | Sunny | 1 to 5 mph SW | 0% |
| Sunday Night | 32°F | Partly Cloudy | 3 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 3 mph SW | 0% |
| Monday Night | 32°F | Mostly Cloudy | 2 mph SW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph WSW | 0% |
| Tuesday Night | 33°F | Partly Cloudy | 3 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Rock Springs (41.595, -109.221). Updated through the day.
Growing snapshot for Rock Springs
Last spring frost
May 24
First fall frost
Sep 24
Growing season
121 days
Hardiness zone
5a
More local growing data for Rock Springs: nearby ZIP 82943 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Arrowhead Springs
Bairoil
Clearview Acres
Eden
Farson
Granger
Green River
James Town
Little America
McKinnon
North Rock Springs
Point of Rocks
Purple Sage
Reliance
Superior
Table Rock
Wamsutter
Climate data from the nearest NOAA station, Rock Springs Fire Dept, Wy (9 mi from Rock Springs). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.