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Decatur, Wisconsin Weather Forecast
Decatur, Wisconsin Weather
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Weather Forecast for Decatur, Wisconsin : Green County
Issued: 1:52 am CST Dec 7, 2025 Latitude: 42.63433 Longitude: -89.41155 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
100% chance of snow on Overnight 20% chance of snow on Sunday Mostly Cloudy on Monday 20% chance of rain on Tuesday 20% chance of snow on Wednesday 30% chance of snow on Thursday Partly Sunny on Friday Partly Sunny on Saturday
Low: 23°F High: 10 °F High: 22°F High: 36°F High: 34°F High: 23°F High: 14°F High: 9°F
Low: 1 °F Low: 17 °F Low: 28°F Low: 13°F Low: 4°F Low: -4°F  
Snow Snow Mostly Cloudy Rain Snow Snow Partly Sunny Partly Sunny
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Current Conditions at
MONROE - (KEFT)
23°
Feels like 12°F
Cloudy
Light Snow
as of 1:35 AM CST
Rel. Humidity: 92%
Dew Point: 21°F
Visibility: 1 3/4 Miles
Pressure: 29.97 in.
Flight Rule: IFR
Wind Data
10 MPH
030° Northeast
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
JANESVILLE - (KJVL)
23°
Cloudy
Light Snow
as of 1:40 AM CST
Rel. Humidity: 100%
Dew Point: 23°F
Visibility: 3/4 Miles
Pressure: 30.00 in.
Flight Rule: MVFR
Wind Data
6 MPH
020° North
Current Conditions at
ROCKFORD - (KRFD)
25°
Clear
Heavy Snow Freezing Fog
as of 1:36 AM CST
Rel. Humidity: 100%
Dew Point: 25°F
Visibility: 1/4 Miles
Pressure: 30.00 in.
Flight Rule: IFR
Wind Data
8 MPH
0° North
100% chance of snow Overnight Overnight... Snow. The snow could be heavy at times. Steady temperature around 23. North wind 5 to 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 inches possible.

20% chance of snow Sunday Sunday... A 20 percent chance of snow before 8am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 10 by 5pm. Wind chill values between zero and 10. North wind 10 to 15 mph.

Increasing Clouds on Sunday Night Sunday Night... Increasing clouds, with a low around 1. Wind chill values between -5 and -10. North wind around 5 mph becoming calm after midnight.

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

30% chance of snow Monday Night Monday Night... A 30 percent chance of snow. Mostly 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.

20% chance of rain Tuesday Tuesday... A 20 percent chance of rain after noon. Mostly cloudy, with a high near 36. Southwest wind 10 to 15 mph.

90% chance of rain & snow Tuesday Night Tuesday Night... Rain before 3am, then rain and snow likely. Low around 28. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

20% chance of snow Wednesday Wednesday... A 20 percent chance of snow before noon. Mostly cloudy, with a high near 34. Northwest wind 10 to 15 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 13.

30% chance of snow Thursday Thursday... A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 23.

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 Decatur, Wisconsin
Sunrise: 07:15 AM
Sunset: 4:24 PM
Civil Sunrise:06:43 AM
Civil Sunset: 4:56 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 5:31 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.