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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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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Hillside Colony
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Spink Colony
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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.