Eureka, IL Weather Forecast

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Eureka, IL Weather Forecast

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Eureka IL weather  - Clear - 50°F
Clear
50°F
Updated 7:13 am
Feels Like 53°F
Humidity 92%
Wind N 0 mph
Barometer  30.33 in
Dew Point 48°F
Eureka IL weather  - Clear - 10°C
Clear
10°C
Updated 7:13 am
Feels Like 12°C
Humidity 92%
Wind N 0 km/h
Barometer  102.7 kPa
Dew Point 9°C

Eureka Weather Forecast

TODAY TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SUNDAY
Eureka, IL Weather - Today Mostly Cloudy Eureka, IL Weather - Tonight Partly Cloudy Eureka, IL Weather - Tuesday Partly Sunny Eureka, IL Weather - Tuesday Night Mostly Cloudy Eureka, IL Weather - Wednesday Partly Sunny Eureka, IL Weather - Wednesday Night Mostly Clear Eureka, IL Weather - Thursday Partly Cloudy Eureka, IL Weather - Thursday Night Partly Cloudy Eureka, IL Weather - Friday Mostly Cloudy Eureka, IL Weather - Friday Night Mostly Cloudy Eureka, IL Weather - Saturday Chance Of Showers Eureka, IL Weather - Sunday Chance Of Showers
Mostly Cloudy Partly Cloudy Partly Sunny Mostly Cloudy Partly Sunny Mostly Clear Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Chance of Showers Chance of Showers
Hi: 75°FHi: 24°C
Lo: 49°FLo: 9°C Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C Hi: 79°FHi: 26°C
Lo: 55°FLo: 13°C
Hi: 79°FHi: 26°C
Lo: 55°FLo: 13°C
Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C
Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C
Hi: 71°FHi: 22°C
Lo: 55°FLo: 13°C
Hi: 71°FHi: 22°C
Lo: 55°FLo: 13°C
POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 637 AM CDT Mon Oct 26 2026 Eureka, IL Weather - WeatherWorld.com

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Eureka Forecast Discussion

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Issued: 557 AM CDT Mon Oct 26 2026

Key Messages

  • Continued above-normal warmth and dry conditions are expected through Friday, with afternoon temperatures in the 70s to near 80 degrees solidifying one of the warmest Octobers on record.
  • Scattered, light showers have a low chance (10-30%) Thursday, primarily near and north of Interstate 72, offering no significant relief to ongoing dry conditions.
  • A pattern shift is favored by next weekend and early November, bringing higher confidence in cooler, breezier, and wetter weather.

Discussi...