Mountain Plains, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mountain Plains, a community in Lawrence County, South Dakota.
Today
73°F
Areas Of Smoke
Areas of smoke. Sunny. High near 73, with temperatures falling to around 71 in the afternoon. North wind around 6 mph, with gusts as high as 17 mph.
7-day forecast for Mountain Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Areas Of Smoke | 6 mph N | 1% |
| Tonight | 53°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SE | 18% |
| Wednesday | 81°F | Sunny | 1 to 5 mph N | 6% |
| Wednesday Night | 58°F | Mostly Clear | 6 mph SE | 1% |
| Thursday | 89°F | Sunny | 1 to 7 mph NW | 2% |
| Thursday Night | 63°F | Mostly Clear | 6 mph SW | 0% |
| Friday | 93°F | Sunny | 2 to 8 mph NW | 1% |
| Friday Night | 68°F | Mostly Clear | 6 to 9 mph S | 1% |
| Saturday | 94°F | Sunny | 2 to 10 mph NW | 2% |
| Saturday Night | 66°F | Mostly Clear | 3 to 9 mph SE | 4% |
| Sunday | 95°F | Mostly Sunny | 3 to 12 mph SE | 10% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 2 to 12 mph SE | 16% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 13 mph E | 18% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 3 to 13 mph SE | 38% |
Forecast source: National Weather Service (api.weather.gov) for Mountain Plains (44.467, -103.864). Updated through the day.
Growing snapshot for Mountain Plains
Last spring frost
May 12
First fall frost
Oct 2
Growing season
143 days
More local growing data for Mountain Plains: nearby ZIP 57799 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Belle Fourche
Boulder Canyon
Central City
Crook City
Deadwood
Lead
North Spearfish
Spearfish
St. Onge
Whitewood
Climate data from the nearest NOAA station, Spearfish, Sd (0.1 mi from Mountain Plains). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.