Carthage, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Carthage, a city in Hancock County, Illinois.
Overnight
51°F
Mostly Cloudy
Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Carthage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 10 to 15 mph SW | 7% |
| Wednesday | 57°F | Mostly Cloudy | 15 to 20 mph W | 10% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 mph SW | 3% |
| Thursday | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph W | 19% |
| Thursday Night | 43°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 23% |
| Friday | 52°F | Partly Sunny | 10 mph N | 8% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 2% |
| Sunday Night | 36°F | Clear | 0 to 5 mph W | 0% |
| Monday | 64°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 65°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.