Mount Vernon, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a city in Posey County, Indiana.
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy. High near 67, with temperatures falling to around 61 in the afternoon. West wind 8 to 14 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 8 to 14 mph W | 0% |
| Tonight | 47°F | Partly Cloudy | 2 to 6 mph WSW | 0% |
| Thursday | 65°F | Sunny | 3 to 9 mph WSW | 0% |
| Thursday Night | 43°F | Partly Cloudy | 3 mph WNW | 0% |
| Friday | 58°F | Partly Sunny | 3 to 12 mph NNW | 0% |
| Friday Night | 34°F | Mostly Clear | 2 to 9 mph N | 0% |
| Saturday | 55°F | Sunny | 2 to 6 mph N | 0% |
| Saturday Night | 31°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 58°F | Sunny | 0 to 6 mph NW | 0% |
| Sunday Night | 33°F | Mostly Clear | 2 mph NW | 0% |
| Monday | 63°F | Sunny | 0 to 5 mph SSW | 0% |
| Monday Night | 36°F | Clear | 2 mph SW | 1% |
| Tuesday | 65°F | Sunny | 1 to 5 mph W | 0% |
| Tuesday Night | 38°F | Mostly Clear | 2 mph NW | 2% |
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 Nov 4, 2026.