Chelsea, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chelsea, a town in Spink County, South Dakota.
Tonight
36°F
Chance Light Rain
A chance of rain. Cloudy. Low around 36, with temperatures rising to around 39 overnight. North northwest wind 13 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Chelsea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 36°F | Chance Light Rain | 13 to 20 mph NNW | 35% |
| Wednesday | 46°F | Chance Light Rain | 17 mph NNW | 44% |
| Wednesday Night | 30°F | Mostly Cloudy | 14 mph NNW | 9% |
| Thursday | 43°F | Partly Sunny | 8 to 13 mph N | 0% |
| Thursday Night | 24°F | Mostly Cloudy | 2 to 7 mph E | 0% |
| Friday | 44°F | Partly Sunny | 2 to 6 mph S | 0% |
| Friday Night | 26°F | Partly Cloudy | 6 mph SSW | 0% |
| Saturday | 57°F | Mostly Sunny | 6 to 12 mph WSW | 3% |
| Saturday Night | 31°F | Mostly Clear | 8 mph W | 1% |
| Sunday | 57°F | Sunny | 6 to 10 mph SW | 1% |
| Sunday Night | 34°F | Mostly Clear | 9 mph SW | 0% |
| Monday | 59°F | Sunny | 9 to 15 mph WNW | 0% |
| Monday Night | 32°F | Mostly Clear | 5 to 8 mph WNW | 0% |
| Tuesday | 54°F | Mostly Sunny | 5 to 8 mph WSW | 0% |
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 Nov 4, 2026.