Oacoma, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oacoma, a town in Lyman County, South Dakota.
This Afternoon
72°F
Mostly Cloudy
Mostly cloudy. High near 72, with temperatures falling to around 69 in the afternoon. North northwest wind around 0 mph.
7-day forecast for Oacoma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Cloudy | 0 mph | 3% |
| Tonight | 59°F | Cloudy then Patchy Fog | 5 to 10 mph N | 5% |
| Saturday | 66°F | Patchy Fog then Cloudy | 10 mph NNE | 8% |
| Saturday Night | 55°F | Cloudy then Slight Chance Rain Showers | 10 mph NE | 16% |
| Sunday | 61°F | Rain Showers Likely | 10 to 15 mph ENE | 57% |
| Sunday Night | 53°F | Rain Showers | 10 mph ENE | 89% |
| Monday | 60°F | Rain Showers | 10 mph E | 89% |
| Monday Night | 49°F | Mostly Cloudy | 5 to 10 mph ESE | 11% |
| Tuesday | 66°F | Partly Sunny | 10 to 15 mph SE | 11% |
| Tuesday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph SE | 16% |
| Wednesday | 70°F | Chance Rain Showers | 15 to 20 mph SSE | 31% |
| Wednesday Night | 56°F | Chance Rain Showers | 10 to 15 mph SSE | 31% |
| Thursday | 72°F | Chance Rain Showers then Partly Sunny | 10 mph SSE | 31% |
| Thursday Night | 56°F | Partly Cloudy | 10 mph SE | 10% |
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 Sep 18, 2026.