Chelsea, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chelsea, a town in Spink County, South Dakota.
Tonight
55°F
Patchy Drizzle
Patchy drizzle and patchy fog. Cloudy, with a low around 55. Northeast wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Chelsea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Patchy Drizzle | 10 mph NE | 22% |
| Saturday | 67°F | Patchy Fog | 13 mph NE | 3% |
| Saturday Night | 53°F | Cloudy then Slight Chance Rain Showers | 8 to 13 mph NE | 20% |
| Sunday | 66°F | Chance Rain Showers | 10 to 14 mph NE | 34% |
| Sunday Night | 50°F | Rain Showers Likely | 7 to 12 mph ENE | 57% |
| Monday | 64°F | Rain Showers Likely | 9 mph E | 57% |
| Monday Night | 47°F | Mostly Cloudy | 8 mph ESE | 10% |
| Tuesday | 67°F | Partly Sunny | 7 to 14 mph SE | 3% |
| Tuesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph SSE | 15% |
| Wednesday | 69°F | Slight Chance Rain Showers | 14 to 18 mph SSE | 19% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 15 mph SSE | 28% |
| Thursday | 71°F | Chance Rain Showers then Partly Sunny | 10 mph SSE | 28% |
| Thursday Night | 54°F | Partly Cloudy | 9 mph SE | 13% |
| Friday | 73°F | Partly Sunny | 8 to 15 mph SE | 13% |
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.