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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

WhenTempForecastWindPrecip
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

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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.