Harman US

Mellette, SD Weather & Growing Conditions

Overnight
57°F
Patchy Fog
Patchy fog before 5am, then patchy fog and a slight chance of drizzle. Cloudy, with a low around 57. North northeast wind around 8 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 57°F Patchy Fog 8 mph NNE 3%
Saturday 67°F Patchy Fog then Cloudy 8 to 13 mph NNE 3%
Saturday Night 51°F Mostly Cloudy 7 to 13 mph NE 9%
Sunday 67°F Mostly Cloudy 13 mph NE 12%
Sunday Night 49°F Cloudy then Slight Chance Rain Showers 6 to 12 mph ENE 22%
Monday 67°F Slight Chance Rain Showers then Mostly Cloudy 8 mph E 22%
Monday Night 44°F Partly Cloudy 7 mph SE 7%
Tuesday 69°F Mostly Sunny 6 to 15 mph SE 3%
Tuesday Night 48°F Partly Cloudy 14 mph SSE 6%
Wednesday 71°F Partly Sunny then Slight Chance Rain Showers 15 to 20 mph SSE 16%
Wednesday Night 52°F Chance Rain Showers 13 to 16 mph SSE 33%
Thursday 73°F Chance Rain Showers then Partly Sunny 10 to 15 mph SSE 33%
Thursday Night 53°F Slight Chance Rain Showers 10 mph SE 20%
Friday 75°F Slight Chance Rain Showers then Partly Sunny 10 to 16 mph SSE 20%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Mellette, SD

Last spring frost
May 11
First fall frost
Sep 27
Growing season
137 days
Hardiness zone
4a

Explore more for Mellette, SD: full frost dates · planting calendar · South Dakota frost dates

Climate data from the nearest NOAA station, Mellette 4 W, Sd (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.