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.
Tonight
60°F
Cloudy
Cloudy, with a low around 60. North northwest wind 5 to 10 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Cloudy | 5 to 10 mph NNW | 11% |
| Saturday | 68°F | Patchy Fog then Cloudy | 10 to 15 mph N | 11% |
| Saturday Night | 56°F | Cloudy | 10 to 15 mph NNE | 7% |
| Sunday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 51% |
| Sunday Night | 53°F | Rain Showers | 10 to 15 mph ENE | 81% |
| Monday | 62°F | Rain Showers | 10 mph E | 81% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Tuesday | 66°F | Partly Sunny | 5 to 15 mph SE | 7% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 15 mph SE | 9% |
| Wednesday | 69°F | Slight Chance Rain Showers | 15 to 20 mph SSE | 22% |
| Wednesday Night | 54°F | Chance Rain Showers | 15 mph SSE | 40% |
| Thursday | 71°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph SSE | 40% |
| Thursday Night | 55°F | Mostly Cloudy | 10 mph SE | 8% |
| Friday | 72°F | Partly Sunny | 10 to 15 mph SE | 9% |
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 Sep 19, 2026.