Mount Vernon, MO Weather & Growing Conditions
Today
92°F
Sunny
Sunny, with a high near 92. Heat index values as high as 95. South wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Sunny | 2 to 7 mph S | 0% |
| Tonight | 73°F | Mostly Clear | 3 to 7 mph SE | 2% |
| Wednesday | 95°F | Mostly Sunny | 8 mph S | 11% |
| Wednesday Night | 73°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph S | 32% |
| Thursday | 93°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 mph SW | 39% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 57% |
| Friday | 89°F | Showers And Thunderstorms Likely | 6 mph S | 57% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 29% |
| Saturday | 91°F | Slight Chance Showers And Thunderstorms | 7 mph S | 21% |
| Saturday Night | 72°F | Mostly Clear | 7 mph S | 9% |
| Sunday | 92°F | Sunny | 7 to 10 mph SW | 3% |
| Sunday Night | 73°F | Mostly Clear | 7 mph S | 3% |
| Monday | 93°F | Sunny | 10 mph SW | 2% |
| Monday Night | 74°F | Mostly Clear | 8 mph S | 2% |
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 Aug 4, 2026.