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Mellette, SD Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mellette, a city in Spink County, South Dakota.

Tonight
55°F
Areas Of Drizzle
Areas of drizzle and patchy fog. Cloudy. Low around 55, with temperatures rising to around 58 overnight. Northeast wind 8 to 12 mph. Chance of precipitation is 30%.

7-day forecast for Mellette

WhenTempForecastWindPrecip
Tonight 55°F Areas Of Drizzle 8 to 12 mph NE 30%
Saturday 68°F Patchy Fog 10 to 14 mph NNE 3%
Saturday Night 52°F Mostly Cloudy then Slight Chance Rain Showers 8 to 13 mph NE 15%
Sunday 67°F Cloudy then Chance Rain Showers 10 to 14 mph ENE 31%
Sunday Night 50°F Chance Rain Showers 7 to 12 mph ENE 52%
Monday 64°F Chance Rain Showers 9 mph E 52%
Monday Night 46°F Mostly Cloudy 8 mph ESE 9%
Tuesday 67°F Partly Sunny 6 to 14 mph SE 3%
Tuesday Night 50°F Mostly Cloudy 13 mph SSE 13%
Wednesday 70°F Partly Sunny then Slight Chance Rain Showers 14 to 18 mph SSE 18%
Wednesday Night 53°F Chance Rain Showers 10 to 15 mph SSE 29%
Thursday 72°F Chance Rain Showers then Partly Sunny 8 to 12 mph SSE 29%
Thursday Night 53°F Partly Cloudy 8 mph SSE 13%
Friday 73°F Partly Sunny 8 to 16 mph SE 13%

Forecast source: National Weather Service (api.weather.gov) for Mellette (45.154, -98.498). Updated through the day.

Growing snapshot for Mellette

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

More local growing data for Mellette: nearby ZIP 57461 weather · frost dates · planting calendar · South Dakota frost dates

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