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
72°F
Partly Sunny
Partly sunny, with a high near 72. Northwest wind 5 to 10 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Partly Sunny | 5 to 10 mph NW | 11% |
| Tonight | 53°F | Partly Cloudy | 5 mph SW | 2% |
| Wednesday | 79°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 59°F | Mostly Clear | 10 to 15 mph S | 1% |
| Thursday | 86°F | Mostly Sunny | 10 to 20 mph S | 6% |
| Thursday Night | 64°F | Mostly Clear | 10 to 15 mph S | 6% |
| Friday | 90°F | Sunny | 10 to 15 mph SSW | 6% |
| Friday Night | 65°F | Mostly Clear | 10 mph SSE | 8% |
| Saturday | 93°F | Sunny | 10 to 20 mph SSE | 4% |
| Saturday Night | 67°F | Mostly Clear | 10 to 20 mph SE | 9% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph E | 5% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 15 mph E | 21% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 15 mph ENE | 21% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 15 mph ENE | 17% |
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 Aug 4, 2026.