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Harmon, IL Weather Forecast

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Harmon, IL Weather Forecast

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Harmon IL weather - Clear - 44°F
Clear
44°F
Updated 4:31 am
Feels Like 48°F
Humidity 85%
Wind E 3 mph
Barometer  30.28 in
Dew Point 40°F
Harmon IL weather - Clear - 7°C
Clear
7°C
Updated 4:31 am
Feels Like 9°C
Humidity 85%
Wind E 5 km/h
Barometer  102.5 kPa
Dew Point 4°C
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Harmon Weather Forecast

REST OF TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY
Harmon, IL Weather - Rest Of Tonight Clear Harmon, IL Weather - Wednesday Sunny Harmon, IL Weather - Wednesday Night Clear Harmon, IL Weather - Thursday Mostly Sunny Harmon, IL Weather - Thursday Night Mostly Clear Harmon, IL Weather - Friday Mostly Sunny Harmon, IL Weather - Friday Night Partly Cloudy Harmon, IL Weather - Saturday Partly Cloudy Harmon, IL Weather - Saturday Night Mostly Cloudy Harmon, IL Weather - Sunday Partly Cloudy Harmon, IL Weather - Sunday Night Mostly Cloudy Harmon, IL Weather - Monday Mostly Cloudy
Clear Sunny Clear Mostly Sunny Mostly Clear Mostly Sunny Partly Cloudy Partly Cloudy Mostly Cloudy Partly 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: 45°FLo: 7°C Hi: 71°FHi: 22°C
 Lo: 50°FLo: 10°C Hi: 71°FHi: 22°C
 Lo: 51°FLo: 11°C Hi: 71°FHi: 22°C
 Lo: 50°FLo: 10°C Hi: 69°FHi: 21°C
POP = Probability of Precipitation.
Weather Outlook Updated: 121 AM CDT Wed Oct 21 2026 Harmon, IL Weather - WeatherWorld.com

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Issued: 157 AM CDT Wed Oct 21 2026

Key Messages

  • Dense fog may develop again early this morning within about 25 miles of Lake Michigan, with highest chances in the northern Chicago suburbs. Any dense fog that does form will quickly burn off by mid-morning.
  • The dry and unseasonably mild weather will continue through the upcoming weekend.

Discussion

... Issued at 157 AM CDT Wed Oct 21 2026

GOES nighttime microphysics RGB shows fog developing across Lake County IL into extreme southeast WI. Given the fog is developing a couple hours earl...