Carthage, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Carthage, a city in Hancock County, Illinois.
Today
88°F
Mostly Cloudy
Mostly cloudy, with a high near 88. South wind 5 to 10 mph.
7-day forecast for Carthage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Cloudy | 5 to 10 mph S | 9% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 5 mph SW | 61% |
| Sunday | 76°F | Showers And Thunderstorms | 5 to 15 mph N | 81% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 10 to 15 mph NE | 69% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph NE | 69% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 70°F | Partly Sunny | 5 mph NE | 4% |
| Thursday Night | 56°F | Partly Cloudy | 5 mph NE | 4% |
| Friday | 73°F | Mostly Sunny | 5 to 10 mph NE | 6% |
| Friday Night | 56°F | Partly Cloudy | 5 mph NE | 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 19, 2026.