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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.

This Afternoon
67°F
Cloudy
Cloudy. High near 67, with temperatures falling to around 64 in the afternoon. Northeast wind around 13 mph.

7-day forecast for Mellette

WhenTempForecastWindPrecip
This Afternoon 67°F Cloudy 13 mph NE 3%
Tonight 58°F Mostly Cloudy 7 to 12 mph NE 2%
Sunday 63°F Mostly Cloudy then Chance Rain Showers 13 mph NE 33%
Sunday Night 49°F Chance Rain Showers 6 to 12 mph ENE 46%
Monday 64°F Slight Chance Rain Showers then Mostly Cloudy 8 mph E 21%
Monday Night 43°F Mostly Cloudy 7 mph SE 2%
Tuesday 66°F Mostly Sunny 6 to 14 mph SE 1%
Tuesday Night 47°F Partly Cloudy 10 to 14 mph SSE 4%
Wednesday 68°F Partly Sunny 15 to 20 mph SSE 10%
Wednesday Night 52°F Showers And Thunderstorms Likely 17 mph SSE 60%
Thursday 72°F Showers And Thunderstorms Likely 10 to 15 mph SSE 60%
Thursday Night 53°F Mostly Cloudy 9 mph SE 9%
Friday 74°F Partly Sunny 7 to 14 mph SE 9%
Friday Night 57°F Mostly Cloudy then Slight Chance Rain Showers 15 mph SSE 24%

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.