Cottonwood, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottonwood, a town in Pennington County, South Dakota.
Overnight
47°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 47. Northwest wind around 7 mph.
7-day forecast for Cottonwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Areas Of Smoke | 7 mph NW | 2% |
| Tuesday | 74°F | Areas Of Smoke then Mostly Sunny | 6 mph W | 7% |
| Tuesday Night | 54°F | Partly Cloudy | 7 mph SW | 5% |
| Wednesday | 85°F | Sunny | 6 to 9 mph SW | 1% |
| Wednesday Night | 58°F | Mostly Clear | 6 to 10 mph S | 4% |
| Thursday | 93°F | Sunny | 7 to 10 mph NW | 1% |
| Thursday Night | 63°F | Mostly Clear | 8 mph SE | 1% |
| Friday | 97°F | Sunny | 7 to 13 mph N | 1% |
| Friday Night | 65°F | Mostly Clear | 8 to 14 mph S | 2% |
| Saturday | 99°F | Sunny | 8 to 15 mph N | 0% |
| Saturday Night | 64°F | Mostly Clear | 6 to 15 mph E | 3% |
| Sunday | 96°F | Mostly Sunny | 6 to 21 mph E | 11% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 9 to 21 mph E | 28% |
| Monday | 93°F | Mostly Sunny | 9 to 18 mph NE | 12% |
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 Aug 4, 2026.