Decatur, Wisconsin Weather
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Weather Forecast for Decatur, Wisconsin : Green County
Issued: 1:22 pm CDT Oct 21, 2025 Latitude: 42.63433 Longitude: -89.41155 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Wednesday Thursday Friday Saturday Sunday Monday
90% chance of thunderstorms on This Afternoon 70% chance of rain on Tonight Mostly Cloudy on Wednesday Sunny on Thursday Sunny on Friday 20% chance of rain on Saturday 20% chance of on Sunday 30% chance of on Monday
High: 50°F Low: 39°F High: 51°F High: 54°F High: 58°F High: 58°F High: 60°F High: 63°F
Low: 33°F Low: 28°F Low: 35°F Low: 42°F Low: 47°F  
Thunderstorms Rain Mostly Cloudy Sunny Sunny Rain Partly Sunny Partly Sunny
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Current Conditions at
MONROE - (KEFT)
48°
Feels like 40°F
Cloudy
as of 1:15 PM CDST
Rel. Humidity: 61%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 29.67 in.
Flight Rule: VFR
Wind Data
24 MPH
Gust: 32 MPH
260° West
Cloud Level(s): Broken at 3300ft, Broken at 4100ft, Solid Overcast at 4700ft
Current Conditions at
JANESVILLE - (KJVL)
48°
Feels like 41°F
Cloudy
as of 12:45 PM CDST
Rel. Humidity: 61%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 29.68 in.
Flight Rule: VFR
Wind Data
20 MPH
Gust: 30 MPH
260° West
Cloud Level(s): Broken at 3500ft, Broken at 4000ft, Solid Overcast at 5000ft
Current Conditions at
ROCKFORD - (KRFD)
48°
Feels like 42°F
Cloudy
Light Rain
as of 12:54 PM CDST
Rel. Humidity: 61%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 29.72 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 26 MPH
250° West
Cloud Level(s): Few at 4100ft, Solid Overcast at 6000ft
90% chance of thunderstorms This Afternoon This Afternoon... Scattered showers, then showers and possibly a thunderstorm after 2pm. High near 50. Breezy, with a west wind around 20 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
70% chance of rain Tonight Tonight... Showers likely, mainly before 10pm. Cloudy, with a low around 39. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 51. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.
Mostly Clear on Wednesday Night Wednesday Night... Widespread frost, mainly after 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 33. Northwest wind 10 to 15 mph.
Sunny on Thursday Thursday... Widespread frost before 8am. Otherwise, sunny, with a high near 54. Northwest wind 10 to 15 mph.
Mostly Clear on Thursday Night Thursday Night... Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 28. Northwest wind around 5 mph becoming calm in the evening.
Sunny on Friday Friday... Widespread frost before 9am. Otherwise, sunny, with a high near 58. Calm wind becoming west around 5 mph in the afternoon.
Cloudy on Friday Night Friday Night... Areas of frost after 2am. Otherwise, partly cloudy, with a low around 35. Southeast wind around 5 mph.
20% chance of rain Saturday Saturday... A 20 percent chance of showers after 1pm. Areas of frost before 8am. Otherwise, mostly sunny, with a high near 58.
30% chance of rain Saturday Night Saturday Night... A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 42.
20% chance of Sunday Sunday... A 20 percent chance of showers. Partly sunny, with a high near 60.
20% chance of rain Sunday Night Sunday Night... A 20 percent chance of showers. Mostly cloudy, with a low around 47.
30% chance of Monday Monday... A 30 percent chance of showers. Partly sunny, with a high near 63.
Current Radar Image


Sun Almanac for Decatur, Wisconsin
Sunrise: 07:19 AM
Sunset: 6:06 PM
Civil Sunrise:06:50 AM
Civil Sunset: 6:34 PM
Nautical Sunrise: 06:17 AM
Nautical Sunset: 7:07 PM
Astro Sunrise: 05:44 AM
Astro Sunset: 7:40 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.