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Carterville, IL 62918 Weather
Current conditions
Observed at Marion - Williamson County Regional Airport · 1 hr ago
Forecast
10-day-
Overnight
Mostly clear, with a low around 44. Wind around 0 mph.
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Wednesday
Sunny. High near 75, with temperatures falling to around 73 in the afternoon. North northeast wind around 2 mph.
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Wednesday Night
Mostly clear, with a low around 46. North wind around 1 mph.
National Weather Service forecast updated 3 hrs ago.
Hourly
Hourly forecast- Now44°
- 6 AM44°
- 7 AM44°
- 8 AM44°
- 9 AM51°
- 10 AM59°
- 11 AM64°
- 12 PM69°
- 1 PM72°
- 2 PM73°
- 3 PM75°
- 4 PM73°
- 5 PM73°
- 6 PM69°
- 7 PM62°
- 8 PM58°
- 9 PM56°
- 10 PM54°
- 11 PM52°
- Thu12 AM51°
- 1 AM50°
- 2 AM49°
- 3 AM48°
- 4 AM48°
10-day forecast
Details- TonightOct 20Mostly Clear44°
- TodayOct 21Sunny46°75°
- ThuOct 22Sunny45°76°
- FriOct 23Sunny45°74°
- SatOct 24Sunny47°75°
- SunOct 25Mostly Sunny47°76°
- MonOct 26Partly Sunny49°75°
- TueOct 27Partly Sunny71°
- WedOct 28Cloudy0.02 in47°60°
- ThuOct 29Sunny39°59°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news in Illinois
More weather news-
Another beautiful day ahead for Central IllinoisDECATUR, Ill. (WAND) – If you’re looking for a reason to get outside, Tuesday is your day. A high-pressure system settling over the Midwest is bringing abundant sunshine and calm winds to Central Illinois, with…
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One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…
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A great week ahead for Central IllinoisWAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…
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Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…
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Overnight Frost Advisory for parts of Illinois, NW IndianaCBS News Colorado 10pm Saturday CBS News Detroit Weekend 11pm CBS News Los Angeles Weekend 9pm CBS News Philadelphia Weekend 11pm KDKA News Weekend 11pm CBS News Texas Weekend 10pm
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Frost advisory back in effect for Central IllinoisWAND DECATUR, Ill. (WAND) – Another cool day starts the weekend across Central Illinois with highs Saturday only reaching the upper 50s under plenty of sunny skies. Strong high pressure remains in control keeping skies…
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Frosty Nights Ahead Before a Warm-Up Arrives in Central IllinoisCENTRAL ILLINOIS (25News Now) - Central Illinois is in for a chilly weekend, with temperatures dropping into the 30s and frost possible overnight. But after a cool start to the weekend, a warming trend will bring…
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Dangerous Freeze Warnings Issued for Iowa, Wisconsin, Minnesota and Illinois as Temperatures DropFreeze Warnings take effect early Saturday across much of Iowa, Wisconsin, southeast and central Minnesota and northern Illinois, with lows as cold as 26 degrees expected. Seven National Weather Service offices issued…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Farrar, MO reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyCarbondale Area, records since 1898. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Carbondale 12 km
- Marion 15 km
- Herrin 7 km
- Harrisburg 49 km
- West Frankfort 20 km
- Murphysboro 21 km
- Benton 29 km
- Du Quoin 29 km
- Pinckneyville 42 km
- Anna 37 km
- Eldorado 58 km
- Johnston City 16 km
Forecasters' discussion
From the National Weather Service office in PAH, issued 5 hrs ago
Key Messages
- Patchy fog, potentially dense will continue to be possible this morning near bodies of water.
- Temperatures will remain near to slightly above normal over the next seven days.
- A 15% chance of a sprinkle or isolated rain shower cannot be ruled out on Tuesday afternoon.
Discussion
Issued at 1216 AM CDT Wed Oct 21 2026
A ridge of high pressure will continue to provide abundant sunshine with ample dry weather conditions over the next seven days. The H5 ridge axis nudges more east on Saturday with heights peaking at 588 dm. This translates to daily light northeasterly winds shifting southerly on Saturday, only resulting in a subtle increase in WAA. Daily temperatures will remain near to slightly above normal in the mid to upper 70s, with lows ranging from the mid to upper 40s. Otherwise, patchy fog near bodies of water will remain possible this morning. The only other weather concern is a 15% chance of a sprinkle or isolated rain shower on Tuesday afternoon as a cold front washes out over the FA. While a 0% PoP is currently progged by the NBM, model ensembles support at least a slight mention.
Aviation
Issued at 505 PM CDT Tue Oct 20 2026
Shallow ground fog will again be possible early Wednesday morning, primarily near bodies of water. CGI is most likely terminal to be impacted. Otherwise VFR conditions with calm or very light NE winds and only a few high clouds (primarily in the west).
Pah Watches
IL...None. MO...None. IN...None. KY...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.