Cottonwood, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottonwood, a town in Pennington County, South Dakota.
Tonight
51°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 51. East wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
7-day forecast for Cottonwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms | 10 mph E | 84% |
| Sunday | 61°F | Rain Showers | 12 to 15 mph E | 89% |
| Sunday Night | 46°F | Showers And Thunderstorms | 7 to 14 mph E | 96% |
| Monday | 63°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph E | 31% |
| Monday Night | 44°F | Mostly Cloudy | 9 to 13 mph SE | 7% |
| Tuesday | 70°F | Partly Sunny | 10 to 22 mph SE | 6% |
| Tuesday Night | 50°F | Partly Cloudy | 14 to 21 mph SE | 7% |
| Wednesday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 15 to 21 mph SE | 16% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 18 mph S | 26% |
| Thursday | 82°F | Sunny | 7 mph NW | 3% |
| Thursday Night | 52°F | Mostly Clear | 7 mph E | 5% |
| Friday | 82°F | Mostly Sunny | 5 to 17 mph SE | 7% |
| Friday Night | 56°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 14 to 17 mph SE | 15% |
| Saturday | 81°F | Slight Chance Rain Showers | 14 to 17 mph S | 22% |
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 Sep 20, 2026.