Weather for Windsor, Wisconsin
Current Weather
Five Day Weather Forecast
Sat
H: 54°F
L: 32°F
Sun
H: 64°F
L: 41°F
Mon
H: 69°F
L: 43°F
Tue
H: 52°F
L: 39°F
Wed
H: 51°F
L: 34°F
Air Quality
Nitrogen Dioxide: 7.45 μg/m3
Sulphur Dioxide: 2.45 μg/m3
Ozone: 35 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:00 PM
Daylight: 14 hrs 11 mins
Moon Transit: 1:12 AM
Moonset: 5:49 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:42 AM - 3:12 AM1:11 PM - 3:41 PM
Minor Periods
9:04 PM - 10:34 PM5:19 AM - 6:49 AM
Action Rating: 3 out of 5
Freeze Warning issued May 1 at 6:45PM CDT until May 2 at 8:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Fri May 1, 2026, 6:45 PM
Expires: Sat May 2, 2026, 2:45 AM
* WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From midnight tonight to 8 AM CDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Take steps now to protect tender plants from the cold.
Flood Warning issued May 1 at 11:09AM CDT until May 3 at 7:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Fri May 1, 2026, 11:09 AM
Expires: Fri May 1, 2026, 11:15 PM
...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. ...The Flood Warning continues for the following rivers in Wisconsin... Rock River At Newville affecting Rock County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is cancelled for the following river in Wisconsin... Rock River At Jefferson affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until 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 10:00 AM CDT Friday the stage was 16.3 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Friday was 16.5 feet. - Forecast...The river is expected to fall below flood stage early Sunday morning and continue falling to 14.6 feet Friday, May 08. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.2 feet on 04/06/2007. - 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 this afternoon at 1215 PM CDT.
Flood Warning issued May 1 at 11:09AM CDT until May 5 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Effective: Fri May 1, 2026, 11:09 AM
Expires: Fri May 1, 2026, 11:15 PM
...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. ...The Flood Warning continues for the following rivers in Wisconsin... Rock River At Newville affecting Rock County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is cancelled for the following river in Wisconsin... Rock River At Jefferson affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 10.5 feet, Floodwaters reach Oxbow Bend Road in the area of the gage on the east side of the lake. * ADDITIONAL DETAILS... - At 10:00 AM CDT Friday the stage was 10.7 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Friday was 10.9 feet. - Forecast...The river is expected to fall below flood stage Tuesday morning and continue falling to 9.3 feet Friday, May 08. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 04/07/2007. - 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 this afternoon at 1215 PM CDT.
Flood Warning issued May 1 at 3:54PM CDT until May 3 at 7:00AM CDT by NWS Milwaukee/Sullivan WI
Effective: Fri May 1, 2026, 3:54 PM
Expires: Sat May 2, 2026, 4:00 AM
...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until 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 3:00 PM CDT Friday the stage was 16.3 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Friday was 16.5 feet. - Forecast...The river is expected to rise to a crest of 16.3 feet this evening. It will then fall below flood stage early Sunday morning. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.2 feet on 04/06/2007. - 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 late tonight at 400 AM CDT.
Flood Warning issued May 1 at 3:54PM CDT until May 5 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Effective: Fri May 1, 2026, 3:54 PM
Expires: Sat May 2, 2026, 4:00 AM
...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 10.5 feet, Floodwaters reach Oxbow Bend Road in the area of the gage on the east side of the lake. * ADDITIONAL DETAILS... - At 3:00 PM CDT Friday the stage was 10.7 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Friday was 10.8 feet. - Forecast...The river is expected to fall below flood stage Tuesday morning and continue falling to 9.3 feet Friday, May 08. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 04/07/2007. - 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 late tonight at 400 AM CDT.
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.91 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 67.44 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:00 PM
Daylight: 14 hrs 11 mins
Moon Transit: 1:12 AM
Moonset: 5:49 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:42 AM - 3:12 AM1:11 PM - 3:41 PM
Minor Periods
9:04 PM - 10:34 PM5:19 AM - 6:49 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.51 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 82.2 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 14 mins
Moon Transit: 2:00 AM
Moonset: 6:21 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:30 AM - 4:00 AM2:00 PM - 4:30 PM
Minor Periods
10:07 PM - 11:37 PM5:51 AM - 7:21 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.53 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 79.96 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:03 PM
Daylight: 14 hrs 16 mins
Moon Transit: 2:50 AM
Moonset: 7:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:20 AM - 4:50 AM2:50 PM - 5:20 PM
Minor Periods
12:00 AM - 12:00 AM6:31 AM - 8:01 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.11 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 74.77 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 19 mins
Moon Transit: 3:41 AM
Moonset: 7:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
3:11 AM - 5:41 AM3:42 PM - 6:12 PM
Minor Periods
7:18 AM - 8:48 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:05 PM
Daylight: 14 hrs 21 mins
Moon Transit: 4:32 AM
Moonset: 8:44 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:02 AM - 6:32 AM4:33 PM - 7:03 PM
Minor Periods
8:14 AM - 9:44 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5