Mount Vernon, MO Weather & Growing Conditions
Tonight
72°F
Clear
Clear. Low around 72, with temperatures rising to around 74 overnight. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Clear | 7 mph S | 2% |
| Saturday | 98°F | Sunny | 7 to 12 mph SW | 1% |
| Saturday Night | 72°F | Partly Cloudy | 8 mph S | 9% |
| Sunday | 94°F | Chance Showers And Thunderstorms | 8 mph W | 28% |
| Sunday Night | 66°F | Showers And Thunderstorms | 5 mph NE | 76% |
| Monday | 83°F | Showers And Thunderstorms | 2 to 8 mph N | 76% |
| Monday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 to 9 mph N | 35% |
| Tuesday | 77°F | Partly Sunny | 8 mph N | 11% |
| Tuesday Night | 55°F | Partly Cloudy | 5 to 9 mph NE | 6% |
| Wednesday | 78°F | Mostly Sunny | 6 mph NE | 2% |
| Wednesday Night | 56°F | Mostly Clear | 5 mph E | 2% |
| Thursday | 79°F | Mostly Sunny | 5 mph NE | 7% |
| Thursday Night | 59°F | Partly Cloudy | 5 mph E | 5% |
| Friday | 80°F | Mostly Sunny | 6 mph E | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Vernon, MO
Last spring frost
Apr 14
First fall frost
Oct 21
Growing season
188 days
Hardiness zone
7a
Explore more for Mount Vernon, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Mt Vernon Univ Mo - Sw Ctr, Mo (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.