Onaka, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onaka, a town in Faulk County, South Dakota.
Today
75°F
Patchy Smoke then Mostly Sunny
Patchy smoke before 10am. Mostly sunny, with a high near 75. Northwest wind around 14 mph, with gusts as high as 22 mph.
7-day forecast for Onaka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Patchy Smoke then Mostly Sunny | 14 mph NW | 0% |
| Tonight | 54°F | Mostly Clear | 6 to 10 mph SW | 0% |
| Wednesday | 82°F | Mostly Sunny | 9 to 14 mph WSW | 0% |
| Wednesday Night | 60°F | Partly Cloudy | 9 to 16 mph SSW | 3% |
| Thursday | 88°F | Sunny | 12 to 15 mph SW | 3% |
| Thursday Night | 62°F | Mostly Clear | 12 mph SW | 3% |
| Friday | 90°F | Sunny | 10 to 14 mph W | 2% |
| Friday Night | 62°F | Mostly Clear | 13 mph E | 2% |
| Saturday | 91°F | Mostly Sunny | 10 to 17 mph E | 3% |
| Saturday Night | 62°F | Mostly Clear | 12 to 16 mph ENE | 6% |
| Sunday | 88°F | Mostly Sunny | 12 to 18 mph ENE | 3% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 14 to 18 mph ENE | 31% |
| Monday | 85°F | Chance Showers And Thunderstorms then Partly Sunny | 14 to 18 mph ENE | 31% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 14 to 18 mph ENE | 26% |
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 Aug 4, 2026.