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.
This Afternoon
46°F
Rain Showers
Rain showers. Cloudy, with a high near 46. Northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 46°F | Rain Showers | 15 to 20 mph NW | 81% |
| Tonight | 33°F | Mostly Cloudy | 15 mph NW | 11% |
| Thursday | 45°F | Mostly Cloudy | 10 to 15 mph NNW | 0% |
| Thursday Night | 26°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Friday | 45°F | Mostly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 28°F | Partly Cloudy | 5 mph SSE | 0% |
| Saturday | 58°F | Sunny | 5 mph SSW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 61°F | Sunny | 5 to 10 mph SW | 0% |
| Sunday Night | 39°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 63°F | Sunny | 10 mph W | 0% |
| Monday Night | 35°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 58°F | Mostly Sunny | 5 mph NNW | 0% |
| Tuesday Night | 37°F | Partly Cloudy | 5 mph SE | 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.