Green Valley, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Valley, a community in Pennington County, South Dakota.
Tonight
56°F
Showers And Thunderstorms
Showers and thunderstorms before 3am, then patchy fog and a slight chance of rain showers. Cloudy. Low around 56, with temperatures rising to around 58 overnight. East wind around 5 mph. Chance of precipitation is 80%.
7-day forecast for Green Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Showers And Thunderstorms | 5 mph E | 75% |
| Saturday | 67°F | Rain Showers Likely | 3 to 8 mph E | 60% |
| Saturday Night | 52°F | Showers And Thunderstorms Likely | 5 to 8 mph E | 74% |
| Sunday | 60°F | Rain Showers | 6 to 9 mph E | 99% |
| Sunday Night | 49°F | Showers And Thunderstorms | 3 to 9 mph E | 93% |
| Monday | 63°F | Chance Rain Showers | 5 to 10 mph E | 37% |
| Monday Night | 49°F | Mostly Cloudy | 10 mph SE | 14% |
| Tuesday | 74°F | Mostly Sunny | 10 to 20 mph SE | 5% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Partly Cloudy | 9 to 15 mph S | 17% |
| Wednesday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph S | 20% |
| Wednesday Night | 53°F | Mostly Clear | 7 mph SW | 14% |
| Thursday | 79°F | Sunny | 3 to 9 mph NE | 7% |
| Thursday Night | 54°F | Partly Cloudy | 8 mph SE | 6% |
| Friday | 80°F | Mostly Sunny | 6 to 17 mph S | 9% |
Forecast source: National Weather Service (api.weather.gov) for Green Valley (44.039, -103.112). Updated through the day.
Growing snapshot for Green Valley
Last spring frost
May 12
First fall frost
Oct 1
Growing season
139 days
Hardiness zone
5a
More local growing data for Green Valley: nearby ZIP 57703 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Caputa
Colonial Pine Hills
Cottonwood
Hill City
Johnson Siding
Keystone
New Underwood
Quinn
Rapid City
Wall
Climate data from the nearest NOAA station, Rapid City Rgnl Ap, Sd (2.7 mi from Green Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.