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Union, Wisconsin Weather Forecast
Union, Wisconsin Weather
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Weather Forecast for Union, Wisconsin : Rock County
Issued: 9:17 am CST Dec 7, 2025 Latitude: 42.8244484 Longitude: -89.301784 View on Google Maps

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Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Sunny on Today Increasing Clouds on Tonight Mostly Cloudy on Monday 30% chance of rain & snow on Tuesday 30% chance of snow on Wednesday 30% chance of snow on Thursday Partly Sunny on Friday Partly Sunny on Saturday
High: 11 °F Low: 1 °F High: 22°F High: 35°F High: 33°F High: 22°F High: 14°F High: 9°F
Low: 17 °F Low: 29°F Low: 12°F Low: 4°F Low: -4°F  
Sunny Increasing Clouds Mostly Cloudy Rain & Snow Snow Snow Partly Sunny Partly Sunny
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Current Conditions at
JANESVILLE - (KJVL)
21°
Feels like 9°F
Cloudy
as of 9:45 AM CST
Rel. Humidity: 79%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: MVFR
Wind Data
12 MPH
Gust: 22 MPH
010° North
Cloud Level(s): Solid Overcast at 1200ft
Current Conditions at
MONROE - (KEFT)
19°
Feels like 6°F
Cloudy
as of 10:15 AM CST
Rel. Humidity: 79%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: MVFR
Wind Data
13 MPH
Gust: 23 MPH
0° North
Cloud Level(s): Solid Overcast at 1200ft
Current Conditions at
MADISON - (KMSN)
12°
Feels like -3°F
Mostly Clear
as of 9:53 AM CST
Rel. Humidity: 66%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
14 MPH
350° North
Cloud Level(s): Few at 2100ft
Current Conditions at
WATERTOWN - (KRYV)
16°
Feels like 2°F
Cloudy
as of 10:15 AM CST
Rel. Humidity: 78%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: MVFR
Wind Data
12 MPH
Gust: 17 MPH
010° North
Cloud Level(s): Solid Overcast at 1600ft
Sunny on Today Today... Sunny, with a temperature falling to around 11 by 5pm. Wind chill values between zero and 5. North wind 10 to 15 mph.

Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 1. Wind chill values between -5 and zero. North wind around 5 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.

40% chance of snow Monday Night Monday Night... A 40 percent chance of snow. Cloudy, with a temperature falling to near 17 by 8pm, then rising to around 25 during the remainder of the night. South wind 10 to 15 mph, with gusts as high as 25 mph.

30% chance of rain & snow Tuesday Tuesday... A chance of rain after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 35. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.

90% chance of rain & snow Tuesday Night Tuesday Night... Rain and snow. Low around 29. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

30% chance of snow Wednesday Wednesday... A 30 percent chance of snow before noon. Mostly cloudy, with a high near 33. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 12. Northwest wind 5 to 10 mph.

30% chance of snow Thursday Thursday... A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 22.

30% chance of snow Thursday Night Thursday Night... A 30 percent chance of snow. Mostly cloudy, with a low around 4.

Partly Sunny on Friday Friday... Partly sunny, with a high near 14.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -4.

Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 9.

Current Radar Image


Sun Almanac for Union, Wisconsin
Sunrise: 07:15 AM
Sunset: 4:23 PM
Civil Sunrise:06:43 AM
Civil Sunset: 4:55 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 5:30 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:05 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.