Vergennes, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vergennes, a village in Jackson County, Illinois.
Overnight
71°F
Clear
Clear. Low around 71, with temperatures rising to around 73 overnight. South wind around 1 mph.
7-day forecast for Vergennes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 71°F | Clear | 1 mph S | 2% |
| Saturday | 98°F | Sunny | 2 to 8 mph SW | 2% |
| Saturday Night | 72°F | Mostly Clear | 5 mph SSW | 2% |
| Sunday | 96°F | Mostly Sunny | 6 mph WSW | 2% |
| Sunday Night | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph N | 36% |
| Monday | 84°F | Showers And Thunderstorms Likely | 5 to 10 mph NNE | 61% |
| Monday Night | 60°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 to 10 mph NNE | 61% |
| Tuesday | 74°F | Slight Chance Showers And Thunderstorms | 7 to 13 mph N | 20% |
| Tuesday Night | 55°F | Partly Cloudy | 5 to 13 mph N | 9% |
| Wednesday | 75°F | Mostly Sunny | 6 to 10 mph N | 2% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 9 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 3 to 9 mph N | 2% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 7 mph NNE | 4% |
| Friday | 78°F | Mostly Sunny | 3 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Vergennes (37.902, -89.340). Updated through the day.
Growing snapshot for Vergennes
Last spring frost
Apr 6
First fall frost
Oct 22
Growing season
199 days
Hardiness zone
7a
More local growing data for Vergennes: nearby ZIP 62994 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Ava
Campbell Hill
Carbondale
De Soto
Dowell
Elkville
Gorham
Grand Tower
Harrison
Makanda
Murphysboro
Rockwood
Climate data from the nearest NOAA station, Du Quoin 4 Se, Il (10.1 mi from Vergennes). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.