Vernon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vernon, a village in Marion County, Illinois.
This Afternoon
95°F
Mostly Cloudy
Mostly cloudy, with a high near 95. Southwest wind around 3 mph.
7-day forecast for Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 95°F | Mostly Cloudy | 3 mph SW | 4% |
| Tonight | 72°F | Partly Cloudy | 0 to 3 mph S | 3% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 20% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph N | 69% |
| Monday | 80°F | Showers And Thunderstorms Likely | 6 to 9 mph NE | 69% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 5 to 9 mph NE | 49% |
| Tuesday | 72°F | Slight Chance Rain Showers | 6 to 10 mph NE | 22% |
| Tuesday Night | 54°F | Mostly Cloudy | 3 to 10 mph N | 3% |
| Wednesday | 73°F | Mostly Sunny | 5 to 9 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 8 mph N | 0% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 6 mph N | 15% |
| Friday | 78°F | Slight Chance Rain Showers | 2 to 6 mph NE | 15% |
| Friday Night | 56°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Vernon (38.801, -89.088). Updated through the day.
Growing snapshot for Vernon
Last spring frost
Apr 10
First fall frost
Oct 24
Growing season
196 days
Hardiness zone
6b
More local growing data for Vernon: nearby ZIP 62892 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Vandalia, Il (10.4 mi from Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.