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Slim Lake, IL Weather Forecast

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Slim Lake, IL Weather Forecast

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Slim Lake IL weather - Clear - 54°F
Clear
54°F
Updated 8:37 pm
Feels Like 54°F
Humidity 77%
Wind N 0 mph
Barometer  30.3 in
Dew Point 47°F
Slim Lake IL weather - Clear - 12°C
Clear
12°C
Updated 8:37 pm
Feels Like 12°C
Humidity 77%
Wind N 0 km/h
Barometer  102.6 kPa
Dew Point 8°C
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Slim Lake Weather Forecast

TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Slim Lake, IL Weather - Tonight Clear Slim Lake, IL Weather - Wednesday Sunny Slim Lake, IL Weather - Wednesday Night Mostly Clear Slim Lake, IL Weather - Thursday Sunny Slim Lake, IL Weather - Thursday Night Clear Slim Lake, IL Weather - Friday Mostly Clear Slim Lake, IL Weather - Friday Night Mostly Clear Slim Lake, IL Weather - Saturday Partly Cloudy Slim Lake, IL Weather - Sunday Partly Cloudy Slim Lake, IL Weather - Sunday Night Mostly Cloudy Slim Lake, IL Weather - Monday Mostly Cloudy Slim Lake, IL Weather - Monday Night Mostly Cloudy
Clear Sunny Mostly Clear Sunny Clear Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Lo: 45°FLo: 7°C Hi: 75°FHi: 24°C
 Lo: 49°FLo: 9°C Hi: 75°FHi: 24°C
 Lo: 49°FLo: 9°C Hi: 75°FHi: 24°C
Lo: 49°FLo: 9°C		 Hi: 75°FHi: 24°C
Lo: 49°FLo: 9°C		 Hi: 75°FHi: 24°C
Lo: 51°FLo: 11°C		 Hi: 75°FHi: 24°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Lo: 45°FLo: 7°C
POP = Probability of Precipitation.
Weather Outlook Updated: 522 PM CDT Tue Oct 20 2026 Slim Lake, IL Weather - WeatherWorld.com

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Issued: 602 PM CDT Tue Oct 20 2026

Key Messages

  • Dry conditions and tranquil weather prevail across central and southeast Illinois through this weekend.
  • Above normal temperatures will dominate the region, with afternoon highs climbing into the mid to upper 70s.

Discussion

... Issued at 1233 PM CDT Tue Oct 20 2026

Expansive surface high pressure centered south of James Bay extends southwest into the mid and lower Mississippi Valley this afternoon. Broad subsidence and very dry air below 500 mb will lead to clear skies through tonight. ...