Oacoma, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oacoma, a town in Lyman County, South Dakota.
Overnight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. North northwest wind around 10 mph.
7-day forecast for Oacoma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Partly Cloudy | 10 mph NNW | 5% |
| Tuesday | 70°F | Patchy Smoke then Partly Sunny | 5 to 10 mph NW | 11% |
| Tuesday Night | 55°F | Partly Cloudy | 5 mph SSW | 3% |
| Wednesday | 79°F | Mostly Sunny | 5 to 15 mph SSW | 1% |
| Wednesday Night | 61°F | Partly Cloudy | 10 to 15 mph S | 2% |
| Thursday | 87°F | Mostly Sunny | 5 to 15 mph S | 6% |
| Thursday Night | 65°F | Mostly Clear | 5 to 15 mph S | 6% |
| Friday | 91°F | Sunny | 5 to 10 mph S | 4% |
| Friday Night | 66°F | Mostly Clear | 5 to 10 mph SE | 4% |
| Saturday | 93°F | Sunny | 5 to 20 mph SSE | 4% |
| Saturday Night | 66°F | Mostly Clear | 10 to 20 mph ESE | 9% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph E | 5% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 28% |
| Monday | 88°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph ENE | 28% |
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 Aug 4, 2026.