Mount Vernon, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a city in Davison County, South Dakota.
Today
46°F
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a high near 46. Northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Rain Showers Likely | 15 to 20 mph NW | 71% |
| Tonight | 34°F | Mostly Cloudy | 15 mph NW | 13% |
| Thursday | 45°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday Night | 28°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Friday | 46°F | Mostly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 28°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 57°F | Sunny | 5 to 10 mph SW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 to 10 mph W | 0% |
| Sunday | 59°F | Sunny | 5 to 10 mph SW | 0% |
| Sunday Night | 38°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 62°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 36°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 59°F | Mostly Sunny | 5 mph SW | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 5 mph SSE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Mount Vernon (43.713, -98.261). Updated through the day.
Growing snapshot for Mount Vernon
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
167 days
Hardiness zone
5a
More local growing data for Mount Vernon: nearby ZIP 57363 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mitchell, Sd (10.9 mi from Mount Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.