Vernon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vernon, a village in Marion County, Illinois.
Overnight
58°F
Slight Chance Light Rain
A slight chance of rain. Mostly cloudy, with a low around 58. Southwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Slight Chance Light Rain | 10 mph SW | 22% |
| Wednesday | 61°F | Slight Chance Drizzle | 7 to 13 mph W | 19% |
| Wednesday Night | 43°F | Partly Cloudy | 5 mph W | 0% |
| Thursday | 64°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 43°F | Mostly Cloudy | 3 mph NW | 1% |
| Friday | 57°F | Partly Sunny | 5 to 12 mph NW | 1% |
| Friday Night | 34°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 60°F | Sunny | 1 to 7 mph NW | 1% |
| Sunday Night | 33°F | Clear | 2 mph NW | 1% |
| Monday | 64°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 2 mph SW | 0% |
| Tuesday | 67°F | Sunny | 1 to 5 mph W | 1% |
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 Nov 4, 2026.