Carterville, IL Weather

Williamson County9:38 AM CDT37.76°N, 89.08°WElevation 453 ft

Current conditions

Mostly Sunny
53°
Mostly Sunny
Feels like 53°
High 77°·Low 46°
WindE 2 mph
Humidity83%
Dew point48°
Visibility10 mi
Cloud cover28%
UV index1 Low
Sunrise7:14 AM
Sunset6:08 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Saturday

    Sunny. High near 77, with temperatures falling to around 74 in the afternoon. East southeast wind around 3 mph.

  • Saturday Night

    Mostly clear, with a low around 46. East southeast wind around 1 mph.

  • Sunday

    Mostly sunny, with a high near 79. South southwest wind around 2 mph.

National Weather Service forecast updated 1 day ago.

Hourly

Hourly forecast
  1. Now Mostly Sunny 53°
  2. 10 AM Sunny 62°
  3. 11 AM Sunny 66°
  4. 12 PM Sunny 70°
  5. 1 PM Mostly Sunny 73°
  6. 2 PM Sunny 74°
  7. 3 PM Sunny 75°
  8. 4 PM Mostly Sunny 76°
  9. 5 PM Mostly Sunny 74°
  10. 6 PM Mostly Clear 71°
  11. 7 PM Partly Cloudy 66°
  12. 8 PM Clear 59°
  13. 9 PM Mostly Clear 56°
  14. 10 PM Mostly Clear 55°
  15. 11 PM Mostly Clear 54°
  16. Sun12 AM Mostly Clear 53°
  17. 1 AM Mostly Clear 52°
  18. 2 AM Mostly Clear 51°
  19. 3 AM Mostly Clear 50°
  20. 4 AM Partly Cloudy 49°
  21. 5 AM Partly Cloudy 48°
  22. 6 AM Mostly Sunny 47°
  23. 7 AM Mostly Sunny 47°
  24. 8 AM Mostly Sunny 52°

10-day forecast

Details
  1. FriOct 23 Sunny Sunny45°76°
  2. TodayOct 24 Sunny Sunny46°77°
  3. SunOct 25 Mostly Sunny Mostly Sunny48°79°
  4. MonOct 26 Partly Sunny Partly Sunny48°76°
  5. TueOct 27 Partly Sunny Partly Sunny49°75°
  6. WedOct 28 Mostly Sunny Mostly Sunny49°76°
  7. ThuOct 29 Mostly Sunny Mostly Sunny48°76°
  8. FriOct 30 Partly cloudy Partly cloudy44°65°
  9. SatOct 31 Mostly sunny Mostly sunny48°69°
  10. SunNov 1 Cloudy Cloudy54°75°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Illinois

More weather news
  • Capitol Fax.com - Your Illinois News Radar » Good morning!

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    Capitol Fax.com·2 days ago
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    Shaw Local·3 days ago
  • Gorgeous weather continues for Central Illinois

    WEDNESDAY: Warming up with sunny skies and calm conditions. High: 75 Low: 47 THURSDAY: Above average with sunny skies. High: 76 Low: 47 FRIDAY: Nice weather continues with sunny skies. High: 76 Low: 46 SATURDAY: Some…

    Newschannel 20·3 days ago
  • Another beautiful day ahead for Central Illinois

    DECATUR, 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…

    wandtv.com·4 days ago
  • Central Illinois Winter Weather Outlook

    The winter weather outlook for central and southeast Illinois has been released, and a detailed summary is available at this link. Some of the highlights: Current Conditions Latest Observations Daily Climate Maps…

    weather.gov·4 days ago
  • One of the year’s most pleasant weather stretches arrives in Central Illinois

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    wandtv.com·5 days ago
  • A great week ahead for Central Illinois

    WAND 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…

    wandtv.com·5 days ago
  • Sunshine, chilly mornings and a big warm-up ahead for central Illinois

    CENTRAL 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…

    25newsnow.com·6 days ago
  • Overnight Frost Advisory for parts of Illinois, NW Indiana

    CBS 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

    CBS News·6 days ago
  • Frost advisory back in effect for Central Illinois

    WAND 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…

    wandtv.com·6 days ago

Air quality

41
Good
Ozone

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

Sunrise 7:14 AM
Sunset 6:08 PM
Daylight 10 h 54 min (−2 min 15 s tomorrow)
Waxing Gibbous · 97% lit
Moonrise 4:59 PM Moonset 5:30 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low67° / 42°
Month to date1.00 in (normal 2.62 in)

Carbondale Area, records since 1898. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in PAH, issued 15 hrs ago

Key Messages

- Patchy daybreak fog is possible each morning.

- Nearly perfect weather with highs 75-80F and lows 45-50F.

Discussion

Issued at 1245 PM CDT Fri Oct 23 2026

A strong upper level ridge will effectively block all perturbatory flow impediments to our close to perfection 7-day weather forecast. It will keep us pleasantly dry with daily highs in the mid-upper 70s and lows in the mid-upper 40s; a few outlier 80-81F and 50-51F readings are possible.

Patchy daybreak fog cannot be completely ruled out any morning but it should be shallow/brief and burn off quickly if/where it occurs.

Enjoy the dry weather run while we can as it appears we transition to an above normal pcpn pattern in the 6-10/8-14 day outlooks.

Aviation

Issued at 559 PM CDT Fri Oct 23 2026

VFR conditions are anticipated through the TAF period. As has been the case the last few nights some patchy ground fog is possible near warm bodies of water otherwise clear skies and light to calm winds are anticipated.

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 4Conservative index and reflects what the press published. Terms of use.