Cottonwood, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottonwood, a town in Pennington County, South Dakota.
Overnight
30°F
Partly Cloudy
Partly cloudy, with a low around 30. Northwest wind around 8 mph, with gusts as high as 16 mph.
7-day forecast for Cottonwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Partly Cloudy | 8 mph NW | 0% |
| Wednesday | 52°F | Partly Sunny | 9 to 16 mph NW | 0% |
| Wednesday Night | 32°F | Mostly Cloudy | 7 to 10 mph NW | 0% |
| Thursday | 52°F | Sunny | 3 to 7 mph NE | 0% |
| Thursday Night | 27°F | Partly Cloudy | 6 mph SE | 0% |
| Friday | 54°F | Mostly Sunny | 3 to 7 mph NW | 0% |
| Friday Night | 32°F | Mostly Clear | 3 to 8 mph W | 0% |
| Saturday | 62°F | Sunny | 7 to 15 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 7 mph W | 0% |
| Sunday | 66°F | Sunny | 7 to 13 mph SW | 0% |
| Sunday Night | 40°F | Mostly Clear | 10 mph W | 0% |
| Monday | 63°F | Sunny | 3 to 12 mph NW | 0% |
| Monday Night | 36°F | Partly Cloudy | 5 mph W | 0% |
| Tuesday | 62°F | Mostly Sunny | 5 to 9 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Cottonwood (43.970, -101.904). Updated through the day.
Growing snapshot for Cottonwood
Last spring frost
May 16
First fall frost
Sep 26
Growing season
132 days
Hardiness zone
5a
More local growing data for Cottonwood: nearby ZIP 57775 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Caputa
Colonial Pine Hills
Green Valley
Hill City
Johnson Siding
Keystone
New Underwood
Quinn
Rapid City
Wall
Climate data from the nearest NOAA station, Cottonwood 2 E, Sd (11.5 mi from Cottonwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.