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Union, IL Weather Forecast

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Union, IL Weather Forecast

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Union IL weather - Clear - 73°F
Clear
73°F
Updated 10:33 am
Feels Like 70°F
Humidity 61%
Wind SSE 12 mph
Barometer  30.2 in
Dew Point 59°F
Union IL weather - Clear - 23°C
Clear
23°C
Updated 10:33 am
Feels Like 21°C
Humidity 61%
Wind SSE 19 km/h
Barometer  102.3 kPa
Dew Point 15°C
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Union Weather Forecast

TODAY TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT
Union, IL Weather - Today Patchy Fog Union, IL Weather - Tonight Partly Cloudy Union, IL Weather - Tuesday Partly Cloudy Union, IL Weather - Tuesday Night Chance Of T-Storm Union, IL Weather - Wednesday Chance Of T-Storm Union, IL Weather - Wednesday Night Clearing Union, IL Weather - Thursday Mostly Sunny Union, IL Weather - Thursday Night Clear Union, IL Weather - Friday Partly Cloudy Union, IL Weather - Friday Night Chance Of Showers Union, IL Weather - Saturday Partly Cloudy Union, IL Weather - Saturday Night Partly Cloudy
Patchy Fog Partly Cloudy Partly Cloudy Chance of T-Storm Chance of T-Storm Clearing Mostly Sunny Clear Partly Cloudy Chance of Showers Partly Cloudy Partly Cloudy
Hi: 79°FHi: 26°C
 Lo: 60°FLo: 16°C Hi: 85°FHi: 29°C
 Lo: 70°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 59°FLo: 15°C Hi: 79°FHi: 26°C
 Lo: 55°FLo: 13°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C
POP: 70% POP: 70% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 841 AM CDT Mon Sep 07 2026 Union, IL Weather - WeatherWorld.com

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Issued: 613 AM CDT Mon Sep 7 2026

Key Messages

  • Seasonably warm today for Labor Day with mostly sunny skies and no rain in the forecast.
  • Rain and thunderstorm chances return to the forecast Tuesday night and Wednesday.

Discussion

... Issued at 256 AM CDT Mon Sep 7 2026

Our Labor Day is off to a quiet start. Temperatures are slowly falling through the 60s and blowoff cirrus is scooting overhead from decaying convection to the west. There is a signal for some patches of fog to develop south of I-80 as well as west of the Fox River vall...