Weather for Mukwonago, Wisconsin
Current Weather
Five Day Weather Forecast
Wed
H: 51°F
L: 41°F
Thu
H: 51°F
L: 33°F
Fri
H: 48°F
L: 32°F
Sat
H: 51°F
L: 31°F
Sun
H: 57°F
L: 38°F
Air Quality
Nitrogen Dioxide: 3.45 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 89 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:52 PM
Daylight: 14 hrs 2 mins
Moon Transit: 11:39 PM
Moonset: 4:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
11:01 AM - 1:31 PM12:00 AM - 12:00 AM
Minor Periods
5:42 PM - 7:12 PM4:07 AM - 5:37 AM
Action Rating: 3 out of 5
Flood Warning issued April 28 at 9:26PM CDT until May 1 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Tue April 28, 2026, 9:26 PM
Expires: Wed April 29, 2026, 9:30 AM
...The Flood Warning is extended for the following rivers in Wisconsin... Rock River At Fort Atkinson affecting Jefferson County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Jefferson. * WHEN...Until early Friday morning. * IMPACTS...At 11.0 feet, Floodwaters affect low lying areas of residential and business property in Jefferson. Water approaches the intersection of Highway 26 (Main St) and County Road N (E Dane St). S Center Ave near the river flooded and Riverview Drive near the wastewater plant flooded. Park is flooded. The retention pond at S Main St and E Dane St is full. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 10.5 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 10.7 feet. - Forecast...The river is expected to fall below flood stage Thursday evening and continue falling to 8.1 feet Tuesday, May 05. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 03/17/2009. - http://www.weather.gov/safety/flood
Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued Wednesday morning at 930 AM CDT.
Flood Warning issued April 28 at 9:26PM CDT until May 3 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Tue April 28, 2026, 9:26 PM
Expires: Wed April 29, 2026, 9:30 AM
...The Flood Warning is extended for the following rivers in Wisconsin... Rock River At Fort Atkinson affecting Jefferson County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until early Sunday morning. * IMPACTS...At 17.0 feet, Floodwaters are in the back yards of some homes on Rogers Street on the northeast side of Fort Atkinson and water surrounds a few homes and businesses at the end of Vets Lane near the intersection of Hwy 106 and Blackhawk Island Rd. These roads are flooded in the Fort Atkinson area: Sinissippi Drive, Vets Ln, Fox Hill Rd, Bark River Road from Kutz Road to Rock River Road, Rock River Rd from Milwaukee Ave E to Hwy 106, North Shore Rd, Ralph Rd. The river walkway in Fort Atkinson becomes flooded. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 16.8 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 16.9 feet. - Forecast...The river is expected to fall below flood stage Saturday evening and continue falling to 15.1 feet Tuesday, May 05. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.8 feet on 10/12/2019. - http://www.weather.gov/safety/flood
Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued Wednesday morning at 930 AM CDT.
Flood Warning issued April 28 at 9:26PM CDT until May 5 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Tue April 28, 2026, 9:26 PM
Expires: Wed April 29, 2026, 9:30 AM
...The Flood Warning is extended for the following rivers in Wisconsin... Rock River At Fort Atkinson affecting Jefferson County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until Tuesday, May 05. * IMPACTS...At 11.0 feet, In the Town of Lake Koshkonong, floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow Bend Road. There is widespread flooding of roads and docks in the Town of Koshkonong and Town of Sumner including Vets Lane, Blackhawk Island Road and Oxbow Bend Road. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 11.1 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 11.2 feet. - Forecast...The river is expected to rise to a crest of 11.1 feet just after midnight tonight. It will then fall below flood stage Monday evening. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 11.2 feet on 07/31/2010. - http://www.weather.gov/safety/flood
Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued Wednesday morning at 930 AM CDT.
Flood Warning issued April 29 at 4:55AM CDT until May 1 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Wed April 29, 2026, 4:55 AM
Expires: Wed April 29, 2026, 5:00 PM
...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Jefferson. * WHEN...Until early Friday morning. * IMPACTS...At 10.0 feet, Water affects low lying areas of residential property in the City of Jefferson. Rock River Park and boat launch is affected near Hwy B in Johnson Creek. * ADDITIONAL DETAILS... - At 4:00 AM CDT Wednesday the stage was 10.5 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Wednesday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.5 feet this morning. It will then fall below flood stage tomorrow evening. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 03/17/2009. - http://www.weather.gov/safety/flood
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 500 PM CDT.
Flood Warning issued April 29 at 4:55AM CDT until May 3 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Wed April 29, 2026, 4:55 AM
Expires: Wed April 29, 2026, 5:00 PM
...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until early Sunday morning. * IMPACTS...At 16.5 feet, In the Fort Atkinson area, the following roads are impacted: Sinnissippi Drive, Bark River Road from Kutz Road to Rock River Road, and Rock River Road from Highway 106 to the Fort Atkinson city limits. Water is in park land near the river in Fort Atkinson. * ADDITIONAL DETAILS... - At 4:00 AM CDT Wednesday the stage was 16.7 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Wednesday was 16.9 feet. - Forecast...The river is expected to fall below flood stage Saturday evening and continue falling to 15.1 feet Tuesday evening. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.6 feet on 06/06/2000. - http://www.weather.gov/safety/flood
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 500 PM CDT.
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 75.4 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:52 PM
Daylight: 14 hrs 2 mins
Moon Transit: 11:39 PM
Moonset: 4:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
11:01 AM - 1:31 PM12:00 AM - 12:00 AM
Minor Periods
5:42 PM - 7:12 PM4:07 AM - 5:37 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.48 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 72 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:53 PM
Daylight: 14 hrs 4 mins
Moon Transit: 12:00 AM
Moonset: 4:57 AM
Moon Phase: Full
Moon Illumination: 99.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:43 AM - 2:13 PM
Minor Periods
6:47 PM - 8:17 PM4:27 AM - 5:57 AM
Action Rating: 5 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.26 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 68.64 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:55 PM
Daylight: 14 hrs 7 mins
Moon Transit: 12:22 AM
Moonset: 5:20 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:28 AM - 2:58 PM
Minor Periods
7:54 PM - 9:24 PM4:50 AM - 6:20 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.07 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 70.48 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:56 PM
Daylight: 14 hrs 9 mins
Moon Transit: 1:08 AM
Moonset: 5:46 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:38 AM - 3:08 AM1:15 PM - 3:45 PM
Minor Periods
8:58 PM - 10:28 PM5:16 AM - 6:46 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.58 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 63.92 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:57 PM
Daylight: 14 hrs 12 mins
Moon Transit: 1:56 AM
Moonset: 6:19 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:26 AM - 3:56 AM2:04 PM - 4:34 PM
Minor Periods
10:01 PM - 11:31 PM5:49 AM - 7:19 AM
Action Rating: 4 out of 5