Oacoma, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oacoma, a town in Lyman County, South Dakota.
Tonight
38°F
Cloudy
Cloudy. Low around 38, with temperatures rising to around 41 overnight. Northwest wind 15 to 20 mph, with gusts as high as 30 mph.
7-day forecast for Oacoma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 38°F | Cloudy | 15 to 20 mph NW | 12% |
| Wednesday | 48°F | Chance Light Rain | 15 to 20 mph NW | 31% |
| Wednesday Night | 37°F | Mostly Cloudy | 10 to 15 mph NW | 11% |
| Thursday | 51°F | Mostly Sunny | 10 mph NNW | 1% |
| Thursday Night | 30°F | Partly Cloudy | 0 to 5 mph ENE | 0% |
| Friday | 50°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Friday Night | 32°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 60°F | Mostly Sunny | 5 to 10 mph W | 6% |
| Saturday Night | 36°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 62°F | Sunny | 5 to 10 mph SSW | 0% |
| Sunday Night | 40°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 62°F | Sunny | 10 to 15 mph NW | 0% |
| Monday Night | 38°F | Partly Cloudy | 5 mph W | 0% |
| Tuesday | 60°F | Mostly Sunny | 5 to 10 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Oacoma (43.805, -99.366). Updated through the day.
Growing snapshot for Oacoma
Last spring frost
May 1
First fall frost
Oct 7
Growing season
158 days
Hardiness zone
5a
More local growing data for Oacoma: nearby ZIP 57365 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chamberlain Muni Ap, Sd (5.8 mi from Oacoma). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.