Mount Vernon, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a city in Rockcastle County, Kentucky.
Today
91°F
Patchy Fog then Slight Chance Showers And Thunderstorms
Patchy fog before 9am, then a slight chance of showers and thunderstorms. Mostly sunny. High near 91, with temperatures falling to around 89 in the afternoon. Heat index values as high as 98. South wind around 3 mph. Chance of precipitation is 20%.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 3 mph S | 19% |
| Tonight | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SSE | 29% |
| Sunday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 19% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph WNW | 22% |
| Monday | 86°F | Slight Chance Showers And Thunderstorms | 5 mph N | 31% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 3 to 7 mph NE | 54% |
| Tuesday | 79°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NNE | 65% |
| Tuesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph ENE | 61% |
| Wednesday | 75°F | Rain Showers Likely | 5 mph SW | 69% |
| Wednesday Night | 58°F | Showers And Thunderstorms Likely | 3 mph N | 69% |
| Thursday | 74°F | Slight Chance Rain Showers | 2 to 6 mph N | 22% |
| Thursday Night | 56°F | Slight Chance Rain Showers then Partly Cloudy | 2 to 6 mph NNE | 17% |
| Friday | 73°F | Mostly Sunny | 2 to 7 mph NNE | 6% |
| Friday Night | 54°F | Partly Cloudy | 3 to 7 mph NNE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Mount Vernon (37.357, -84.333). Updated through the day.
Growing snapshot for Mount Vernon
Last spring frost
Apr 18
First fall frost
Oct 24
Growing season
189 days
Hardiness zone
7a
More local growing data for Mount Vernon: nearby ZIP 40456 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Vernon, Ky (1 mi from Mount Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.