Weather for Fitchburg, Wisconsin
Current Weather
Five Day Weather Forecast
Wed
H: 54°F
L: 33°F
Thu
H: 55°F
L: 33°F
Fri
H: 60°F
L: 39°F
Sat
H: 70°F
L: 45°F
Sun
H: 57°F
L: 40°F
Air Quality
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 73 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 20 mins
Moon Transit: 4:32 AM
Moonset: 8:45 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
8:15 AM - 9:45 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Flood Warning issued May 5 at 9:29PM CDT until May 7 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Effective: Tue May 5, 2026, 9:29 PM
Expires: Wed May 6, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Rock and Winnebago Counties. 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 Near Lake Koshkonong affecting Rock and Jefferson Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until early Thursday afternoon. * IMPACTS...At 9.0 feet, Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 9.2 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 9.4 feet. - Forecast...The river is expected to rise to a crest of 9.3 feet just after midnight tonight. It will then fall below flood stage Thursday morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 9.3 feet on 05/02/1921. - 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 evening at 1030 PM CDT.
Flood Warning issued May 6 at 3:04AM CDT until May 7 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Effective: Wed May 6, 2026, 3:04 AM
Expires: Wed May 6, 2026, 3:15 PM
...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Winnebago and Rock Counties. ...The Flood Warning is cancelled for the following rivers in Wisconsin... 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 Afton. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 9.0 feet, Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 2:00 AM CDT Wednesday the stage was 9.2 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 2:00 AM CDT Wednesday was 9.3 feet. - Forecast...The river is expected to rise to a crest of 9.2 feet this morning. It will then fall below flood stage tomorrow morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 9.2 feet on 03/14/1944. - 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 early this morning at 415 AM CDT.
Flood Warning issued May 5 at 9:29PM CDT by NWS Milwaukee/Sullivan WI
Effective: Tue May 5, 2026, 9:29 PM
Expires: Wed May 6, 2026, 9:30 AM
...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Rock and Winnebago Counties. 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 Near Lake Koshkonong affecting Rock and Jefferson Counties. * WHAT...Minor flooding is occurring. * WHERE...ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 10.0 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 10.2 feet. - Forecast...No forecast is available for this location. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.0 feet on 08/27/2007. - 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 evening at 1030 PM CDT.
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.95 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 61.88 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 20 mins
Moon Transit: 4:32 AM
Moonset: 8:45 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
8:15 AM - 9:45 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.39 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 58.8 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:06 PM
Daylight: 14 hrs 22 mins
Moon Transit: 5:23 AM
Moonset: 9:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
4:53 AM - 7:23 AM5:22 PM - 7:52 PM
Minor Periods
9:17 AM - 10:47 AM12:34 AM - 2:04 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 73.2 μg/m3
Astronomical
Sun Transit: 12:53 AM
Sunset: 8:07 PM
Daylight: 14 hrs 25 mins
Moon Transit: 6:11 AM
Moonset: 10:52 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%
Best Times for Fishing or Hunting
Major Periods
5:41 AM - 8:11 AM6:10 PM - 8:40 PM
Minor Periods
10:22 AM - 11:52 AM1:08 AM - 2:38 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.99 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 73.16 μg/m3
Astronomical
Sun Transit: 12:53 AM
Sunset: 8:08 PM
Daylight: 14 hrs 27 mins
Moon Transit: 6:58 AM
Moonset: 11:59 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%
Best Times for Fishing or Hunting
Major Periods
6:28 AM - 8:58 AM6:56 PM - 9:26 PM
Minor Periods
11:29 AM - 12:59 AM1:36 AM - 3:06 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.68 μg/m3
Sulphur Dioxide: 1.84 μg/m3
Ozone: 56.23 μg/m3
Astronomical
Sun Transit: 12:53 AM
Sunset: 8:09 PM
Daylight: 14 hrs 29 mins
Moon Transit: 7:43 AM
Moonset: 1:07 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%
Best Times for Fishing or Hunting
Major Periods
7:13 AM - 9:43 AM7:40 PM - 10:10 PM
Minor Periods
12:37 AM - 2:07 PM2:00 AM - 3:30 AM
Action Rating: 3 out of 5