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Sullivan, IL Weather

It is 73°F and cloudy in Sullivan, IL, observed at 3:35 PM CDT. Today: Mostly Sunny, high 73°F, low 53°F. Hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Sullivan, IL current weather

73°F

Cloudy

H 73° / L 53°Feels like 72°

6° cooler than yesterday at this time

  • No rain expected in the next 12 hours

Observed at Mattoon / Charleston, Coles County Memorial Airport (19 mi away), 10/30/2026, 3:35 PM CDT

Hourly forecast

NWS, updated 10/30/2026, 1:21 PM PT

  1. Now71°
  2. 4 PM72°
  3. 5 PM71°
  4. 6 PM67°
  5. 7 PM64°
  6. 8 PM61°
  7. 9 PM59°
  8. 10 PM57°
  9. 11 PM56°
  10. 12 AM55°Sat
  11. 1 AM55°
  12. 2 AM54°
  13. 3 AM54°
  14. 4 AM54°
  15. 5 AM54°
  16. 6 AM54°
  17. 7 AM53°
  18. 8 AM54°
  19. 9 AM57°
  20. 10 AM62°10%
  21. 11 AM65°10%
  22. 12 PM67°12%
  23. 1 PM68°13%
  24. 2 PM69°13%
  25. 3 PM69°12%
  26. 4 PM69°12%
  27. 5 PM70°12%
  28. 6 PM68°
  29. 7 PM64°
  30. 8 PM61°
  31. 9 PM59°
  32. 10 PM58°
  33. 11 PM58°
  34. 12 AM57°12%Sun
  35. 1 AM57°14%
  36. 1 AM57°11%
  37. 2 AM57°
  38. 3 AM57°
  39. 4 AM56°
  40. 5 AM56°31%
  41. 6 AM56°60%
  42. 7 AM55°60%
  43. 8 AM58°60%
  44. 9 AM62°60%
  45. 10 AM64°60%
  46. 11 AM65°60%
  47. 12 PM65°50%
  48. 1 PM65°50%

10-day forecast

Tap a day for details

  • Today10/30Low 53°High 73°

    This Afternoon: Mostly sunny, with a high near 73. East wind around 9 mph.

    Tonight: Mostly cloudy, with a low around 53. East wind around 7 mph.

    Mostly Sunny
  • Sat10/3131% chance of precipitationLow 54°High 70°

    Saturday: Cloudy, with a high near 70. East wind around 8 mph.

    Saturday Night: A chance of rain showers after 5am. Mostly cloudy, with a low around 54. East wind around 6 mph. Chance of precipitation is 30%.

    Cloudy
  • Sun11/160% chance of precipitationLow 50°High 66°

    Sunday: Rain showers likely. Mostly cloudy. High near 66, with temperatures falling to around 60 in the afternoon. Southeast wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

    Sunday Night: A slight chance of rain showers before midnight. Mostly cloudy, with a low around 50. Southeast wind around 8 mph.

    Rain Showers Likely
  • Mon11/242% chance of precipitationLow 56°High 67°

    Monday: A chance of rain showers. Mostly cloudy, with a high near 67. South southeast wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

    Monday Night: A chance of rain showers. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

    Chance Rain Showers
  • Tue11/367% chance of precipitationLow 54°High 71°

    Tuesday: Rain showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.

    Tuesday Night: Rain showers likely. Mostly cloudy, with a low around 54.

    Rain Showers Likely
  • Wed11/462% chance of precipitationLow 49°High 68°

    Wednesday: Rain showers likely. Partly sunny, with a high near 68.

    Wednesday Night: A slight chance of rain showers. Mostly cloudy, with a low around 49.

    Rain Showers Likely
  • Thu11/533% chance of precipitationLow 43°High 66°

    Thursday: A chance of rain showers. Mostly cloudy, with a high near 66.

    Thursday Night: A slight chance of rain showers before midnight. Mostly cloudy, with a low around 43.

    Chance Rain Showers
  • Fri11/6Model blend14% chance of precipitationLow 38°High 63°

    Friday: Partly cloudy. High near 63°. Low that night near 38°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sat11/7Model blendLow 36°High 62°

    Saturday: Partly cloudy. High near 62°. Low that night near 36°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sun11/8Model blend16% chance of precipitationLow 37°High 62°

    Sunday: Partly cloudy. High near 62°. Low that night near 37°. About 0.10 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 39.587, -88.607 from the NWS ILX office, updated 10/30/2026, 1:21 PM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KDEC (Decatur Arpt, 22 mi), model run 10/30/2026, 9:00 AM CDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now71°Mostly Sunny9%9 mph
  2. 4 PM72°Partly Sunny9%8 mph
  3. 5 PM71°Partly Sunny9%8 mph
  4. 6 PM67°Mostly Cloudy7%7 mph
  5. 7 PM64°Mostly Cloudy6%7 mph
  6. 8 PM61°Mostly Cloudy4%7 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Observed today

Since midnight, vs yesterday and normal

Today's high so far is 14° above the normal of 60° and 5° cooler than yesterday's high.

High so far
74°
14° above normal
Low so far
51°
Normal low 39°
Precipitation
0.00 in
Since midnight
Yesterday
High 79° · Low 58° · Precip 0.00 in
Normal for today
High 60° · Low 39°

Observed at Mattoon / Charleston, Coles County Memorial Airport (KMTO) since midnight local time, through 3:35 PM. Station reports are preliminary and not quality controlled. Normals are estimated from 1991 to 2020 monthly normals at Sullivan 3s.

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the weather in Sullivan, IL right now?
The latest observation from Mattoon / Charleston, Coles County Memorial Airport was 73°F and cloudy, reported at 10/30/2026, 3:35 PM CDT.
What is the high temperature today in Sullivan, IL?
The National Weather Service forecast for this afternoon calls for a high near 73°F. Mostly Sunny.
Will it rain in Sullivan, IL in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Sullivan, IL?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 6 to Nov 8) come from the NOAA National Blend of Models, with highs of 62°F to 63°F. Model guidance this far out often changes.
What time is sunrise and sunset in Sullivan, IL today?
Sunrise is about 7:20 AM CDT and sunset is about 5:55 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Sullivan, IL?
At Sullivan 3s, the 1991 to 2020 normal high in October is 67°F and the normal low is 44°F.

Nearby hazards

Illinois hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

AQI forecast today (Decatur)
GoodPM2.5
AQI forecast tomorrow (Decatur)
ModeratePM2.5

UV index guide · Air quality

Drought

By county

Moultrie County, week of 10/27/2026

10% of the county is in moderate drought or worse.

Sun and moon

Local time, center of the area

Sunrise
7:20 AM
Sunset
5:55 PM
Daylight
10 hr 34 min
Moon
Waning Gibbous 77% lit
First light (civil dawn)
6:53 AM
Last light (civil dusk)
6:22 PM
Moonrise
9:36 PM
Moonset
12:33 PM

Normal October weather

Climate

Normal October high 67°, low 44°, precipitation 3.30 in for the month. 1991 to 2020 normals at Sullivan 3s, 2 mi away.

Other places nearby

Data sources

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About this data

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