Cave-In-Rock, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cave-In-Rock, a village in Hardin County, Illinois.
Overnight
63°F
Mostly Clear
Mostly clear. Low around 63, with temperatures rising to around 66 overnight. North northeast wind around 1 mph.
7-day forecast for Cave-In-Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 1 mph NNE | 0% |
| Tuesday | 85°F | Sunny | 1 to 5 mph NE | 0% |
| Tuesday Night | 64°F | Mostly Clear | 2 mph NNE | 0% |
| Wednesday | 88°F | Sunny | 2 mph SW | 0% |
| Wednesday Night | 68°F | Mostly Clear | 1 mph S | 1% |
| Thursday | 89°F | Partly Sunny | 1 to 5 mph SSW | 12% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 3 mph S | 31% |
| Friday | 88°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 38% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 3 mph SW | 37% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 31% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 mph SSW | 27% |
| Sunday | 89°F | Mostly Sunny | 2 to 6 mph SSW | 13% |
| Sunday Night | 71°F | Mostly Clear | 3 mph SSW | 10% |
| Monday | 91°F | Sunny | 3 to 7 mph SSW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Cave-In-Rock (37.471, -88.166). Updated through the day.
Growing snapshot for Cave-In-Rock
Last spring frost
Apr 19
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
7a
More local growing data for Cave-In-Rock: nearby ZIP 62919 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rosiclare 5Nw, Il (15.4 mi from Cave-In-Rock). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.