Carthage, IL Weather & Growing Conditions
Tonight
71°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 71. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 17% |
| Saturday | 89°F | Partly Sunny | 5 to 10 mph S | 11% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph NW | 60% |
| Sunday | 78°F | Rain Showers Likely | 5 to 10 mph N | 63% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 10 mph NE | 66% |
| Monday | 67°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Tuesday | 64°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 29% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 70°F | Partly Sunny | 5 mph NE | 4% |
| Thursday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Carthage, IL
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6a
Explore more for Carthage, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Bentley, Il (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.