Weather Alert
Cornell Park Weather Warning NWS WEATHER ALERT FOR THE CORNELL PARK, IL AREA - Issued: 308 PM CDT Fri Sep 18 2026 Cornell Park Weather Warning

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Cornell Park, IL Weather Forecast

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Cornell Park, IL Weather Forecast

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Cornell Park IL weather - Light Rain - 68°F
Light Rain
68°F
Updated 6:53 pm
Feels Like 64°F
Humidity 78%
Wind E 6 mph
Barometer  30.15 in
Dew Point 61°F
Cornell Park IL weather - Light Rain - 20°C
Light Rain
20°C
Updated 6:53 pm
Feels Like 18°C
Humidity 78%
Wind E 10 km/h
Barometer  102 kPa
Dew Point 16°C
WX Settings

Cornell Park Weather Forecast

LATE THIS AFTERNOON TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Cornell Park, IL Weather - Late This Afternoon Chance Of Showers Cornell Park, IL Weather - Tonight Chance Of T-Storm Cornell Park, IL Weather - Saturday Chance Of T-Storm Cornell Park, IL Weather - Saturday Night Chance Of T-Storm Cornell Park, IL Weather - Sunday Chance Of T-Storm Cornell Park, IL Weather - Sunday Night Chance Of Showers Cornell Park, IL Weather - Monday Chance Of Showers Cornell Park, IL Weather - Monday Night Chance Of Showers Cornell Park, IL Weather - Tuesday Mostly Cloudy Cornell Park, IL Weather - Tuesday Night Mostly Cloudy Cornell Park, IL Weather - Wednesday Mostly Cloudy Cornell Park, IL Weather - Wednesday Night Mostly Cloudy
Chance of Showers Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Chance of Showers Chance of Showers Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Hi: 70°FHi: 21°C
 Lo: 61°FLo: 16°C Hi: 75°FHi: 24°C
 Lo: 61°FLo: 16°C Hi: 69°FHi: 21°C
 Lo: 55°FLo: 13°C Hi: 65°FHi: 18°C
 Lo: 51°FLo: 11°C Hi: 61°FHi: 16°C
 Lo: 51°FLo: 11°C Hi: 65°FHi: 18°C
 Lo: 51°FLo: 11°C
POP: 50% POP: 60% POP: 90% POP: 80% POP: 70% POP: 50% POP: 50% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 251 PM CDT Fri Sep 18 2026 Cornell Park, IL Weather - WeatherWorld.com

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Issued: 257 PM CDT Fri Sep 18 2026

Key Messages

  • Periods of heavy rain and scattered thunderstorms late tonight through Sunday night. Localized flash flooding will be possible where the heaviest rains occur over the same areas. A Flood Watch for flash flooding is in effect for much of northern Illinois and far northwest Indiana late tonight through Saturday morning.
  • Below normal temps early next week then dry weather expected mid/late next week.

Discussion

... Issued at 257 PM CDT Fri Sep 18 2026

An unseasonably strong mid-level ridge...