Mount Vernon, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a city in Posey County, Indiana.
Overnight
72°F
Partly Cloudy
Partly cloudy. Low around 72, with temperatures rising to around 74 overnight. Southeast wind around 2 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Partly Cloudy | 2 mph SE | 3% |
| Saturday | 99°F | Sunny | 2 to 7 mph SW | 6% |
| Saturday Night | 72°F | Mostly Clear | 5 mph SSW | 3% |
| Sunday | 98°F | Sunny | 3 to 8 mph WSW | 2% |
| Sunday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 mph N | 25% |
| Monday | 88°F | Showers And Thunderstorms Likely | 6 to 10 mph NNE | 60% |
| Monday Night | 61°F | Showers And Thunderstorms Likely | 7 to 13 mph NNE | 60% |
| Tuesday | 78°F | Chance Showers And Thunderstorms | 7 to 12 mph N | 28% |
| Tuesday Night | 58°F | Partly Cloudy | 5 to 13 mph N | 12% |
| Wednesday | 77°F | Mostly Sunny | 6 to 10 mph N | 6% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 10 mph N | 2% |
| Thursday | 78°F | Mostly Sunny | 3 to 9 mph N | 2% |
| Thursday Night | 57°F | Partly Cloudy | 3 to 9 mph NNE | 2% |
| Friday | 79°F | Mostly Sunny | 3 to 9 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Mount Vernon (37.937, -87.896). Updated through the day.
Growing snapshot for Mount Vernon
Last spring frost
Apr 7
First fall frost
Oct 28
Growing season
202 days
Hardiness zone
7a
More local growing data for Mount Vernon: nearby ZIP 47620 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Vernon, In (0.5 mi from Mount Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.