Carterville, IL Weather & Growing Conditions
This Afternoon
98°F
Sunny
Sunny. High near 98, with temperatures falling to around 96 in the afternoon. West southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Sunny | 7 mph WSW | 1% |
| Tonight | 73°F | Mostly Clear | 5 mph SSW | 1% |
| Sunday | 96°F | Mostly Sunny | 6 mph WSW | 1% |
| Sunday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph NNE | 29% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 8 mph NE | 54% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 3 to 8 mph NNE | 54% |
| Tuesday | 76°F | Chance Showers And Thunderstorms | 6 to 10 mph NNE | 48% |
| Tuesday Night | 57°F | Partly Cloudy | 3 to 10 mph N | 3% |
| Wednesday | 75°F | Mostly Sunny | 6 to 9 mph N | 1% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 2 to 7 mph N | 0% |
| Thursday Night | 58°F | Mostly Cloudy | 1 to 5 mph NNE | 0% |
| Friday | 79°F | Partly Sunny | 2 to 8 mph NNE | 4% |
| Friday Night | 58°F | Partly Cloudy | 2 to 6 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Carterville, IL
Last spring frost
Apr 9
First fall frost
Oct 22
Growing season
195 days
Hardiness zone
7a
Explore more for Carterville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Carbondale Sewage Plt, Il (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.