Lake Carroll, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Carroll, a community in Carroll County, Illinois.
This Afternoon
71°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 71. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
7-day forecast for Lake Carroll
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Chance Showers And Thunderstorms | 10 mph SE | 39% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 10 to 15 mph E | 73% |
| Saturday | 78°F | Showers And Thunderstorms | 5 to 10 mph S | 85% |
| Saturday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph N | 75% |
| Sunday | 68°F | Rain Showers Likely | 10 to 15 mph NE | 72% |
| Sunday Night | 53°F | Chance Rain Showers | 15 mph NE | 52% |
| Monday | 64°F | Chance Rain Showers | 15 mph NE | 44% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Tuesday | 63°F | Chance Rain Showers | 15 mph NE | 28% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 15 mph NE | 8% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 5% |
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 Sep 18, 2026.