Lake Carroll, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Carroll, a community in Carroll County, Illinois.
Overnight
52°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. South wind 10 to 15 mph. Chance of precipitation is 30%.
7-day forecast for Lake Carroll
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Chance Rain Showers | 10 to 15 mph S | 29% |
| Wednesday | 58°F | Chance Rain Showers | 15 mph SW | 42% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 27% |
| Thursday | 55°F | Rain Showers Likely | 10 to 15 mph W | 56% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 15% |
| Friday | 49°F | Partly Sunny | 5 to 10 mph N | 4% |
| Friday Night | 29°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 4% |
| Sunday Night | 33°F | Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Lake Carroll (42.171, -89.865). Updated through the day.
Growing snapshot for Lake Carroll
Last spring frost
May 2
First fall frost
Oct 7
Growing season
154 days
Hardiness zone
5a
More local growing data for Lake Carroll: nearby ZIP 61046 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Carroll, Il (8.8 mi from Lake Carroll). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.