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Union Grove, Illinois Weather Forecast
Union Grove, Illinois Weather
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Weather Forecast for Union Grove, Illinois : Whiteside County
Issued: 10:36 am CST Dec 17, 2025 Latitude: 41.8341951 Longitude: -90.0265103 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
Mostly Sunny on This Afternoon 60% chance of rain on Tonight 100% chance of rain & snow on Thursday Mostly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday Partly Sunny on Monday Mostly Cloudy on Tuesday
High: 36°F Low: 42 °F High: 29 °F High: 28°F High: 41°F High: 29°F High: 36°F High: 42°F
Low: 10°F Low: 20°F Low: 16°F Low: 18°F Low: 28°F  
Mostly Sunny Rain Rain & Snow Mostly Sunny Partly Sunny Mostly Sunny Partly Sunny Mostly Cloudy
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Current Conditions at
SAVANNA - (KSFY)
36°
Clear
as of 12:55 PM CST
Rel. Humidity: 74%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
5 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
CLINTON - (KCWI)
34°
Clear
as of 12:56 PM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
STERLING ROCK - (KSQI)
36°
Clear
as of 12:56 PM CST
Rel. Humidity: 74%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
5 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
ALBERTUS AIRPORT - (KFEP)
36°
Clear
as of 12:55 PM CST
Rel. Humidity: 80%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 36. Southeast wind around 5 mph.

60% chance of rain Tonight Tonight... Rain likely, mainly after 5am. Increasing clouds, with a temperature rising to around 42 by 5am. Southeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

100% chance of rain & snow Thursday Thursday... Rain before noon, then scattered snow showers after 5pm. Temperature falling to around 29 by 5pm. Breezy, with a southwest wind 15 to 25 mph becoming west in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

30% chance of snow Thursday Night Thursday Night... Scattered snow showers, mainly before 7pm. Mostly cloudy, with a low around 10. Wind chill values as low as -5. Breezy, with a west wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 28.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 20.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 41.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 16.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 29.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 18.

Partly Sunny on Monday Monday... Partly sunny, with a high near 36.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 28.

Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 42.

Current Radar Image


Sun Almanac for Union Grove, Illinois
Sunrise: 07:22 AM
Sunset: 4:31 PM
Civil Sunrise:06:51 AM
Civil Sunset: 5:02 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:37 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:11 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.