Onaka, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaka, a town in Faulk County, South Dakota.
Overnight
56°F
Areas Of Fog
Areas of fog and a slight chance of drizzle. Cloudy, with a low around 56. North northeast wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Onaka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Areas Of Fog | 8 mph NNE | 16% |
| Saturday | 65°F | Areas Of Fog then Cloudy | 8 to 14 mph NE | 26% |
| Saturday Night | 52°F | Cloudy then Chance Rain Showers | 10 to 14 mph NE | 34% |
| Sunday | 63°F | Chance Rain Showers | 16 mph ENE | 38% |
| Sunday Night | 49°F | Chance Rain Showers | 9 to 15 mph ENE | 40% |
| Monday | 64°F | Chance Rain Showers then Mostly Cloudy | 12 mph E | 40% |
| Monday Night | 45°F | Mostly Cloudy | 10 mph SE | 9% |
| Tuesday | 66°F | Partly Sunny | 9 to 20 mph SE | 5% |
| Tuesday Night | 49°F | Mostly Cloudy | 18 mph SE | 11% |
| Wednesday | 70°F | Partly Sunny then Slight Chance Rain Showers | 17 to 21 mph SSE | 17% |
| Wednesday Night | 52°F | Chance Rain Showers | 13 to 20 mph SE | 37% |
| Thursday | 72°F | Chance Rain Showers then Partly Sunny | 14 mph SE | 31% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 14 mph SE | 17% |
| Friday | 74°F | Partly Sunny | 13 to 18 mph SE | 13% |
Forecast source: National Weather Service (api.weather.gov) for Onaka (45.191, -99.465). Updated through the day.
Growing snapshot for Onaka
Last spring frost
May 7
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
4b
More local growing data for Onaka: nearby ZIP 57466 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Roscoe, Sd (18.7 mi from Onaka). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.