Carthage, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Carthage, a city in Hancock County, Illinois.
Tonight
68°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 10pm, then a chance of showers and thunderstorms between 11pm and 4am, then showers and thunderstorms likely. Mostly cloudy, with a low around 68. West wind around 5 mph. Chance of precipitation is 60%.
7-day forecast for Carthage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Chance Showers And Thunderstorms | 5 mph W | 58% |
| Sunday | 76°F | Showers And Thunderstorms Likely | 5 to 15 mph N | 59% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 to 15 mph NE | 69% |
| Monday | 66°F | Showers And Thunderstorms | 10 to 15 mph NE | 76% |
| Monday Night | 55°F | Rain Showers Likely | 10 mph NE | 68% |
| Tuesday | 64°F | Chance Rain Showers | 10 mph NE | 36% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 3% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph N | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 70°F | Partly Sunny | 5 mph NE | 3% |
| Thursday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NE | 16% |
| Friday | 74°F | Slight Chance Rain Showers | 0 to 5 mph NE | 16% |
| Friday Night | 58°F | Mostly Cloudy | 5 mph NE | 7% |
| Saturday | 75°F | Mostly Sunny | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Carthage (40.414, -91.128). Updated through the day.
Growing snapshot for Carthage
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6a
More local growing data for Carthage: nearby ZIP 62321 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Augusta
Basco
Bentley
Bowen
Dallas City
Elvaston
Ferris
Hamilton
La Harpe
Nauvoo
Niota
Plymouth
Pontoosuc
West Point
Climate data from the nearest NOAA station, Bentley, Il (4.6 mi from Carthage). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.