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