Harman US

Rockham, SD Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Rockham, a town in Hand County, South Dakota.

Today
66°F
Patchy Fog then Cloudy
Patchy fog before 11am. Cloudy, with a high near 66. North northeast wind 9 to 13 mph, with gusts as high as 22 mph.

7-day forecast for Rockham

WhenTempForecastWindPrecip
Today 66°F Patchy Fog then Cloudy 9 to 13 mph NNE 3%
Tonight 51°F Mostly Cloudy then Slight Chance Rain Showers 8 to 13 mph NNE 22%
Sunday 66°F Cloudy then Chance Rain Showers 14 mph NE 28%
Sunday Night 49°F Chance Rain Showers 7 to 13 mph ENE 35%
Monday 65°F Chance Rain Showers then Mostly Cloudy 9 mph E 35%
Monday Night 44°F Mostly Cloudy 8 mph SE 9%
Tuesday 67°F Partly Sunny 7 to 17 mph SE 4%
Tuesday Night 48°F Mostly Cloudy 13 to 16 mph SE 5%
Wednesday 70°F Partly Sunny then Slight Chance Rain Showers 20 mph SSE 17%
Wednesday Night 51°F Chance Rain Showers 16 mph SSE 38%
Thursday 72°F Chance Rain Showers 15 mph SSE 38%
Thursday Night 53°F Slight Chance Rain Showers 13 mph SE 19%
Friday 74°F Slight Chance Rain Showers then Partly Sunny 13 to 18 mph SE 17%
Friday Night 54°F Mostly Cloudy then Slight Chance Rain Showers 17 mph SSE 21%

Forecast source: National Weather Service (api.weather.gov) for Rockham (44.904, -98.823). Updated through the day.

Growing snapshot for Rockham

Last spring frost
May 10
First fall frost
Sep 28
Growing season
139 days
Hardiness zone
4b

More local growing data for Rockham: nearby ZIP 57470 weather · frost dates · planting calendar · South Dakota frost dates

Nearby towns & communities

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Climate data from the nearest NOAA station, Faulkton 1 Nw, Sd (15.8 mi from Rockham). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.