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.

Tonight
55°F
Patchy Drizzle
Patchy drizzle and patchy fog. Cloudy, with a low around 55. North northeast wind 6 to 10 mph. Chance of precipitation is 20%.

7-day forecast for Rockham

WhenTempForecastWindPrecip
Tonight 55°F Patchy Drizzle 6 to 10 mph NNE 20%
Saturday 67°F Patchy Fog 10 to 14 mph NNE 4%
Saturday Night 53°F Cloudy then Chance Rain Showers 8 to 13 mph NE 26%
Sunday 65°F Chance Rain Showers 14 mph NE 38%
Sunday Night 51°F Rain Showers Likely 8 to 12 mph ENE 71%
Monday 63°F Rain Showers Likely 10 mph E 71%
Monday Night 47°F Mostly Cloudy 8 mph ESE 13%
Tuesday 66°F Partly Sunny 7 to 16 mph SE 3%
Tuesday Night 50°F Mostly Cloudy then Slight Chance Rain Showers 15 mph SSE 17%
Wednesday 69°F Slight Chance Rain Showers 16 to 20 mph SSE 22%
Wednesday Night 53°F Chance Rain Showers 12 to 16 mph SE 28%
Thursday 71°F Chance Rain Showers then Partly Sunny 12 mph SSE 28%
Thursday Night 54°F Partly Cloudy 10 mph SE 14%
Friday 72°F Partly Sunny 10 to 16 mph SE 14%

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

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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.