Mount Carroll, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Carroll, a city in Carroll County, Illinois.
Today
85°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Mount Carroll
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 21% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 90% |
| Wednesday | 75°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph N | 73% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 68% |
| Thursday | 79°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 30% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 6% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SE | 4% |
| Friday Night | 63°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 84°F | Sunny | 5 to 10 mph SW | 11% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 22% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 22% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 40% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph NW | 42% |
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 Aug 4, 2026.