Chelsea, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chelsea, a town in Spink County, South Dakota.
Today
76°F
Patchy Smoke then Mostly Sunny
Patchy smoke before 10am. Mostly sunny, with a high near 76. Northwest wind around 10 mph.
7-day forecast for Chelsea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Patchy Smoke then Mostly Sunny | 10 mph NW | 0% |
| Tonight | 53°F | Mostly Clear | 5 to 8 mph SW | 0% |
| Wednesday | 83°F | Mostly Sunny | 6 to 13 mph SW | 1% |
| Wednesday Night | 58°F | Partly Cloudy | 12 mph SSW | 3% |
| Thursday | 88°F | Sunny | 9 to 13 mph SSW | 9% |
| Thursday Night | 61°F | Mostly Clear | 10 mph SSW | 9% |
| Friday | 89°F | Sunny | 7 to 10 mph ESE | 2% |
| Friday Night | 61°F | Mostly Clear | 7 to 12 mph E | 3% |
| Saturday | 88°F | Sunny | 8 to 16 mph E | 5% |
| Saturday Night | 61°F | Mostly Clear | 10 to 15 mph ENE | 10% |
| Sunday | 85°F | Mostly Sunny | 9 to 15 mph NE | 5% |
| Sunday Night | 62°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 26% |
| Monday | 84°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 16 mph NE | 26% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms | 10 to 16 mph NE | 21% |
Forecast source: National Weather Service (api.weather.gov) for Chelsea (45.168, -98.743). Updated through the day.
Growing snapshot for Chelsea
Last spring frost
May 11
First fall frost
Sep 27
Growing season
137 days
Hardiness zone
4a
More local growing data for Chelsea: nearby ZIP 57465 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Ashton
Brentford
Camrose Colony
Clark Colony
Conde
Doland
Frankfort
Glendale Colony
Hillside Colony
Mellette
Northville
Redfield
Spink Colony
Tulare
Turton
Verdon
Climate data from the nearest NOAA station, Mellette 4 W, Sd (4.1 mi from Chelsea). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.