Chelsea, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chelsea, a town in Spink County, South Dakota.
This Afternoon
67°F
Cloudy
Cloudy, with a high near 67. Northeast wind around 13 mph, with gusts as high as 21 mph.
7-day forecast for Chelsea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Cloudy | 13 mph NE | 4% |
| Tonight | 58°F | Mostly Cloudy | 7 to 12 mph NE | 4% |
| Sunday | 63°F | Cloudy then Chance Rain Showers | 13 mph NE | 43% |
| Sunday Night | 50°F | Chance Rain Showers | 6 to 12 mph ENE | 44% |
| Monday | 64°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph E | 22% |
| Monday Night | 43°F | Mostly Cloudy | 7 mph SE | 3% |
| Tuesday | 66°F | Mostly Sunny | 5 to 14 mph SE | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 14 mph SSE | 4% |
| Wednesday | 68°F | Partly Sunny | 15 to 20 mph SSE | 11% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 17 mph SSE | 53% |
| Thursday | 72°F | Chance Showers And Thunderstorms then Partly Sunny | 9 to 14 mph SSE | 53% |
| Thursday Night | 54°F | Mostly Cloudy | 6 to 9 mph SE | 12% |
| Friday | 74°F | Partly Sunny | 6 to 14 mph SE | 10% |
| Friday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph SSE | 23% |
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 Sep 19, 2026.