Mount Carroll, IL Weather & Growing Conditions
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 87% |
| Wednesday | 56°F | Chance Rain Showers | 15 mph SW | 48% |
| 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 | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 33°F | Mostly Clear | 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 | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Carroll, IL
Last spring frost
May 2
First fall frost
Oct 7
Growing season
154 days
Hardiness zone
5a
Explore more for Mount Carroll, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Mt Carroll, Il (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.