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.
Tonight
31°F
Mostly Clear
Mostly clear, with a low around 31. West wind around 5 mph.
7-day forecast for Mountain Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 31°F | Mostly Clear | 5 mph W | 0% |
| Wednesday | 50°F | Partly Sunny | 6 mph W | 0% |
| Wednesday Night | 32°F | Mostly Cloudy | 5 mph SW | 0% |
| Thursday | 56°F | Sunny | 2 to 6 mph SE | 0% |
| Thursday Night | 35°F | Partly Cloudy | 3 to 7 mph SW | 0% |
| Friday | 52°F | Mostly Sunny | 2 to 6 mph W | 1% |
| Friday Night | 38°F | Mostly Clear | 5 to 9 mph SW | 7% |
| Saturday | 57°F | Sunny | 8 to 16 mph W | 6% |
| Saturday Night | 39°F | Mostly Clear | 9 mph SW | 1% |
| Sunday | 66°F | Sunny | 6 to 10 mph SW | 0% |
| Sunday Night | 45°F | Mostly Clear | 6 to 12 mph SW | 0% |
| Monday | 59°F | Sunny | 3 to 7 mph W | 0% |
| Monday Night | 41°F | Partly Cloudy | 6 mph SW | 0% |
| Tuesday | 61°F | Mostly Sunny | 3 to 8 mph W | 2% |
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 Nov 4, 2026.