Mount Carroll, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Carroll, a city in Carroll County, Illinois.
This Afternoon
66°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 66. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Mount Carroll
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Showers And Thunderstorms | 15 to 20 mph S | 97% |
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 87% |
| Wednesday | 56°F | Chance Rain Showers | 15 mph SW | 46% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 26% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 51% |
| Thursday Night | 39°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 26% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 12% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 59°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 3% |
| Monday | 62°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Mount Carroll (42.095, -89.977). Updated through the day.
Growing snapshot for Mount Carroll
Last spring frost
May 2
First fall frost
Oct 7
Growing season
154 days
Hardiness zone
5a
More local growing data for Mount Carroll: nearby ZIP 61053 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mt Carroll, Il (1.6 mi from Mount Carroll). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.