Weather for Seneca, Illinois
Current Weather
Five Day Weather Forecast
Sat
H: 69°F
L: 38°F
Sun
H: 80°F
L: 55°F
Mon
H: 81°F
L: 61°F
Tue
H: 80°F
L: 66°F
Wed
H: 72°F
L: 63°F
Air Quality
Nitrogen Dioxide: 4.25 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 94 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:30 PM
Daylight: 13 hrs 9 mins
Moon Transit: 8:15 AM
Moonset: 1:08 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%
Best Times for Fishing or Hunting
Major Periods
7:45 AM - 10:15 AM8:20 PM - 10:50 PM
Minor Periods
12:38 AM - 2:08 PM3:00 AM - 4:30 AM
Action Rating: 2 out of 5
Flood Warning issued April 10 at 9:04PM CDT by NWS Chicago IL
Effective: Fri April 10, 2026, 9:04 PM
Expires: Sat April 11, 2026, 3:15 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Lake IL and Kane Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * 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 10.0 feet, Winaki Trail and Onaway Trail are threatened south of Algonquin. Athletic fields inundated at Judson College in Elgin. * ADDITIONAL DETAILS... - At 8:30 PM CDT Friday the stage was 9.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Friday was 10.0 feet. - Forecast...The river is expected to gradually fall below flood stage early next week. - 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 Saturday afternoon.
Flood Warning issued April 11 at 10:46AM CDT by NWS Chicago IL
Effective: Sat April 11, 2026, 10:46 AM
Expires: Sun April 12, 2026, 5:00 AM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * 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 9.5 feet, Fox River Drive threatened in East Dundee. Boathouses threatened along the river in Cary. * ADDITIONAL DETAILS... - At 10:30 AM CDT Saturday the stage was 9.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 AM CDT Saturday was 10.0 feet. - Forecast...The river will continue to gradually fall over the next few days and is expected to fall below flood stage early next week. - 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 late tonight.
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.26 μg/m3
Sulphur Dioxide: 3.57 μg/m3
Ozone: 78.56 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:30 PM
Daylight: 13 hrs 9 mins
Moon Transit: 8:15 AM
Moonset: 1:08 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%
Best Times for Fishing or Hunting
Major Periods
7:45 AM - 10:15 AM8:20 PM - 10:50 PM
Minor Periods
12:38 AM - 2:08 PM3:00 AM - 4:30 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 3.77 μg/m3
Ozone: 93.48 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:31 PM
Daylight: 13 hrs 12 mins
Moon Transit: 9:02 AM
Moonset: 2:16 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%
Best Times for Fishing or Hunting
Major Periods
8:32 AM - 11:02 AM9:06 PM - 11:36 PM
Minor Periods
1:46 PM - 3:16 PM3:28 AM - 4:58 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.63 μg/m3
Sulphur Dioxide: 1.74 μg/m3
Ozone: 85.8 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 7:32 PM
Daylight: 13 hrs 14 mins
Moon Transit: 9:48 AM
Moonset: 3:24 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM9:18 AM - 11:48 AM
Minor Periods
2:54 PM - 4:24 PM3:53 AM - 5:23 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.6 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 79.68 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 7:34 PM
Daylight: 13 hrs 17 mins
Moon Transit: 10:34 AM
Moonset: 4:35 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM10:04 AM - 12:34 AM
Minor Periods
4:05 PM - 5:35 PM4:15 AM - 5:45 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.39 μg/m3
Sulphur Dioxide: 1.82 μg/m3
Ozone: 78.77 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 7:35 PM
Daylight: 13 hrs 20 mins
Moon Transit: 10:33 AM
Moonset: 5:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
10:03 AM - 12:33 AM10:03 AM - 12:33 AM
Minor Periods
5:17 PM - 6:47 PM4:37 AM - 6:07 AM
Action Rating: 3 out of 5