National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Peoria - General Downing-Peoria International Airport (KPIA)

Lat: 40.67°NLon: 89.68°WElev: 659ft.

Fog/Mist

81°F

27°C

Humidity 97%
Wind Speed SE 3 mph
Barometer 29.86 in (1010.3 mb)
Dewpoint 80°F (27°C)
Visibility 5.00 mi
Heat Index90°F (32°C)
Last update 27 Jul 12:54 am CDT
Extended Forecast for

Eureka IL

Heat Advisory July 27, 01:02am until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 27, 01:02am until July 27, 09:00pm

    NOW until 9:00pm Mon

    Heat Advisory

  • Overnight

    Low: 75 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 91. Heat index values as high as 109. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. Southwest wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. North wind around 11 mph, with gusts as high as 17 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. Northeast wind 3 to 7 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. North northeast wind 3 to 7 mph.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62. Light and variable wind.

    Low: 62 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 4am. Patchy fog. Otherwise, mostly cloudy, with a low around 75. South southwest wind around 6 mph.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 91. Heat index values as high as 109. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 73. Southwest wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 85. North wind around 11 mph, with gusts as high as 17 mph.
Tuesday Night
Mostly clear, with a low around 62. Northeast wind 3 to 7 mph.
Wednesday
Sunny, with a high near 84. North northeast wind 3 to 7 mph.
Wednesday Night
Clear, with a low around 62. Light and variable wind.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 66.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 83.
Friday Night
A chance of showers. Partly cloudy, with a low around 66.
Saturday
A chance of showers. Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Eureka IL
 40.71°N 89.27°W (Elev. 774 ft)
Last Update:
11:56 pm CDT Jul 26, 2026
Forecast Valid:
1am CDT Jul 27, 2026-6pm CDT Aug 2, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation