Weather for Seneca, Illinois
Current Weather
Five Day Weather Forecast
Sat
H: 73°F
L: 48°F
Sun
H: 70°F
L: 47°F
Mon
H: 74°F
L: 56°F
Tue
H: 63°F
L: 51°F
Wed
H: 59°F
L: 46°F
Air Quality
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 3.85 μg/m3
Ozone: 123 μg/m3
Astronomical
Sun Transit: 12:52 AM
Sunset: 7:45 PM
Daylight: 13 hrs 46 mins
Moon Transit: 8:48 PM
Moonset: 3:13 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%
Best Times for Fishing or Hunting
Major Periods
8:06 AM - 10:36 AM8:18 PM - 10:48 PM
Minor Periods
1:17 PM - 2:47 PM2:43 AM - 4:13 AM
Action Rating: 2 out of 5
Flood Warning issued April 24 at 8:18PM CDT until April 28 at 7:00AM CDT by NWS Chicago IL
Effective: Fri April 24, 2026, 8:18 PM
Expires: Sat April 25, 2026, 2:30 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Russell affecting Lake IL County. Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater, Montgomery...Major flooding is forecast. * 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 Tuesday morning. * 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 7:00 PM CDT Friday the stage was 13.5 feet. - Forecast...The river is expected to remain nearly steady at around 13.5 feet until at least early next week. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood
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. 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. Additional information is available at www.weather.gov. The next statement will be issued by Saturday morning.
Flood Warning issued April 24 at 8:18PM CDT by NWS Chicago IL
Effective: Fri April 24, 2026, 8:18 PM
Expires: Sat April 25, 2026, 2:30 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Russell affecting Lake IL County. Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater, Montgomery...Major flooding is forecast. * WHAT...Major flooding is occurring and is forecasted to continue today. * 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 7:30 PM CDT Friday the stage was 12.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:30 PM CDT Friday was 12.0 feet. - Forecast...The river is expected to rise to a crest of 12.0 feet just after midnight tonight. - Flood stage is 9.5 feet. - Flood History...This crest compares to a previous crest of 11.8 feet on 05/23/2020. - http://www.weather.gov/safety/flood
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. 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. Additional information is available at www.weather.gov. The next statement will be issued by Saturday morning.
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.38 μg/m3
Sulphur Dioxide: 2.69 μg/m3
Ozone: 78.68 μg/m3
Astronomical
Sun Transit: 12:52 AM
Sunset: 7:45 PM
Daylight: 13 hrs 46 mins
Moon Transit: 8:48 PM
Moonset: 3:13 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%
Best Times for Fishing or Hunting
Major Periods
8:06 AM - 10:36 AM8:18 PM - 10:48 PM
Minor Periods
1:17 PM - 2:47 PM2:43 AM - 4:13 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.8 μg/m3
Sulphur Dioxide: 4.31 μg/m3
Ozone: 83.84 μg/m3
Astronomical
Sun Transit: 12:52 AM
Sunset: 7:47 PM
Daylight: 13 hrs 48 mins
Moon Transit: 9:33 PM
Moonset: 3:37 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%
Best Times for Fishing or Hunting
Major Periods
8:52 AM - 11:22 AM9:03 PM - 11:33 PM
Minor Periods
2:26 PM - 3:56 PM3:07 AM - 4:37 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.87 μg/m3
Sulphur Dioxide: 5.2 μg/m3
Ozone: 101.32 μg/m3
Astronomical
Sun Transit: 12:52 AM
Sunset: 7:48 PM
Daylight: 13 hrs 51 mins
Moon Transit: 10:16 PM
Moonset: 3:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%
Best Times for Fishing or Hunting
Major Periods
9:36 AM - 12:06 AM12:00 AM - 12:00 AM
Minor Periods
3:32 PM - 5:02 PM3:29 AM - 4:59 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.09 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 93 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:49 PM
Daylight: 13 hrs 53 mins
Moon Transit: 10:57 PM
Moonset: 4:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%
Best Times for Fishing or Hunting
Major Periods
10:18 AM - 12:48 AM12:00 AM - 12:00 AM
Minor Periods
4:36 PM - 6:06 PM3:49 AM - 5:19 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 14.8 μg/m3
Sulphur Dioxide: 2.84 μg/m3
Ozone: 60.46 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:50 PM
Daylight: 13 hrs 55 mins
Moon Transit: 11:40 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
11:00 AM - 1:30 PM12:00 AM - 12:00 AM
Minor Periods
5:41 PM - 7:11 PM4:09 AM - 5:39 AM
Action Rating: 3 out of 5