Onaka, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaka, a town in Faulk County, South Dakota.
Today
45°F
Patchy Fog then Mostly Cloudy
Patchy fog and a slight chance of rain before 8am. Mostly cloudy, with a high near 45. North northwest wind around 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Onaka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 45°F | Patchy Fog then Mostly Cloudy | 20 mph NNW | 19% |
| Tonight | 31°F | Mostly Cloudy then Patchy Fog | 12 to 17 mph NNW | 1% |
| Thursday | 43°F | Patchy Fog then Mostly Sunny | 7 to 12 mph N | 0% |
| Thursday Night | 24°F | Partly Cloudy | 3 to 7 mph ESE | 0% |
| Friday | 44°F | Mostly Sunny | 5 to 8 mph SSE | 0% |
| Friday Night | 29°F | Partly Cloudy | 7 mph SSW | 1% |
| Saturday | 55°F | Sunny | 7 to 15 mph WSW | 0% |
| Saturday Night | 33°F | Mostly Clear | 10 mph W | 0% |
| Sunday | 57°F | Sunny | 7 to 12 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 12 mph WSW | 0% |
| Monday | 58°F | Mostly Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 34°F | Mostly Clear | 8 mph WNW | 0% |
| Tuesday | 54°F | Mostly Sunny | 6 to 9 mph SW | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 8 mph S | 0% |
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 Nov 4, 2026.