Weather for Romeoville, Illinois
Current Weather
Five Day Weather Forecast
Thu
H: 87°F
L: 52°F
Fri
H: 70°F
L: 56°F
Sat
H: 63°F
L: 49°F
Sun
H: 69°F
L: 48°F
Mon
H: 73°F
L: 52°F
Air Quality
Nitrogen Dioxide: 7.65 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 114 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:42 PM
Daylight: 13 hrs 42 mins
Moon Transit: 7:06 PM
Moonset: 2:05 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%
Best Times for Fishing or Hunting
Major Periods
6:24 AM - 8:54 AM6:36 PM - 9:06 PM
Minor Periods
10:47 AM - 12:17 AM1:35 AM - 3:05 AM
Action Rating: 3 out of 5
Flood Warning issued April 22 at 10:00PM CDT until April 24 at 7:00PM CDT by NWS Chicago IL
Effective: Wed April 22, 2026, 10:00 PM
Expires: Thu April 23, 2026, 4:00 PM
...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL County. * WHAT...Moderate flooding is occurring and is forecasted to continue. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until Friday evening. * IMPACTS...At 14.0 feet, residences threatened east of the river just south of IL-22 (Half-Day Road). Lincolnshire Drive threatened at Wiltshire Lane. * ADDITIONAL DETAILS... - At 8:45 PM CDT Wednesday, the stage was 14.4 feet. - Forecast...The river is expected to continue gradually falling, and may fall below flood stage sometime on Friday. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Thursday afternoon.
Flood Warning issued April 22 at 10:00PM CDT until April 25 at 7:00AM CDT by NWS Chicago IL
Effective: Wed April 22, 2026, 10:00 PM
Expires: Thu April 23, 2026, 4:00 PM
...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL County. * WHAT...Minor flooding is occurring and is forecasted to continue. * WHERE...Des Plaines River from Palatine Road in Prospect Heights downstream to Irving Park Road in Chicago, including the Des Plaines gauge. * WHEN...Until Saturday morning. * IMPACTS...At 17.0 feet, Central Road and Golf Road are threatened in Des Plaines. * ADDITIONAL DETAILS... - At 8:45 PM CDT Wednesday, the stage was 17.2 feet. - Forecast...The river is expected to gradually fall through the week, and may fall below flood stage sometime Friday night or on Saturday. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Thursday afternoon.
Flood Warning issued April 22 at 10:11PM CDT by NWS Chicago IL
Effective: Wed April 22, 2026, 10:11 PM
Expires: Thu April 23, 2026, 4:15 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Minor flooding is occurring and is forecasted to continue. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until further notice. * IMPACTS...At 13.5 feet, low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday, the stage was 13.5 feet. - Forecast...The river is expected to remain nearly steady at around 13.5 to 13.6 feet until at least early next week. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Thursday afternoon.
Flood Warning issued April 22 at 10:11PM CDT by NWS Chicago IL
Effective: Wed April 22, 2026, 10:11 PM
Expires: Thu April 23, 2026, 4:15 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Major flooding is occurring and is forecasted to continue. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge. * WHEN...Until further notice. * IMPACTS...At 12.0 feet, structures threatened along River Street, Johnson Street, and Maiden Lane in East Dundee. North Harrison Street threatened near Riverside Park in Algonquin. Washington Street threatened in Carpentersville. Water Street, Edwards Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road threatened in Elgin. Low-lying areas of Festival Park are threatened in Elgin. * ADDITIONAL DETAILS... - At 9:30 PM CDT Wednesday, the stage was 12.0 feet. - Forecast...The river is expected to rise to a crest of 12.2 feet Thursday evening, then remain steady through Saturday before slowly falling. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Thursday afternoon.
Weather Forecast
Air Quality
Nitrogen Dioxide: 20.65 μg/m3
Sulphur Dioxide: 5.04 μg/m3
Ozone: 69.64 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:42 PM
Daylight: 13 hrs 42 mins
Moon Transit: 7:06 PM
Moonset: 2:05 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%
Best Times for Fishing or Hunting
Major Periods
6:24 AM - 8:54 AM6:36 PM - 9:06 PM
Minor Periods
10:47 AM - 12:17 AM1:35 AM - 3:05 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.09 μg/m3
Sulphur Dioxide: 2.84 μg/m3
Ozone: 92.48 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:43 PM
Daylight: 13 hrs 44 mins
Moon Transit: 7:58 PM
Moonset: 2:42 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%
Best Times for Fishing or Hunting
Major Periods
7:19 AM - 9:49 AM7:28 PM - 9:58 PM
Minor Periods
12:03 AM - 1:33 PM2:12 AM - 3:42 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 14.86 μg/m3
Sulphur Dioxide: 4.82 μg/m3
Ozone: 71.04 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:44 PM
Daylight: 13 hrs 47 mins
Moon Transit: 8:46 PM
Moonset: 3:11 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%
Best Times for Fishing or Hunting
Major Periods
8:09 AM - 10:39 AM8:16 PM - 10:46 PM
Minor Periods
1:14 PM - 2:44 PM2:41 AM - 4:11 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 16.27 μg/m3
Sulphur Dioxide: 5.59 μg/m3
Ozone: 75.52 μg/m3
Astronomical
Sun Transit: 12:50 AM
Sunset: 7:45 PM
Daylight: 13 hrs 49 mins
Moon Transit: 9:31 PM
Moonset: 3:35 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%
Best Times for Fishing or Hunting
Major Periods
8:55 AM - 11:25 AM9:01 PM - 11:31 PM
Minor Periods
2:23 PM - 3:53 PM3:05 AM - 4:35 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 11.6 μg/m3
Sulphur Dioxide: 6.43 μg/m3
Ozone: 88.62 μg/m3
Astronomical
Sun Transit: 12:49 AM
Sunset: 7:46 PM
Daylight: 13 hrs 52 mins
Moon Transit: 10:13 PM
Moonset: 3:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%
Best Times for Fishing or Hunting
Major Periods
9:38 AM - 12:08 AM12:00 AM - 12:00 AM
Minor Periods
3:29 PM - 4:59 PM3:27 AM - 4:57 AM
Action Rating: 2 out of 5