Weather for Seneca, Illinois
Current Weather
Five Day Weather Forecast
Fri
H: 52°F
L: 44°F
Sat
H: 54°F
L: 42°F
Sun
H: 79°F
L: 53°F
Mon
H: 79°F
L: 61°F
Tue
H: 80°F
L: 65°F
Air Quality
Nitrogen Dioxide: 4.05 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 95 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:29 PM
Daylight: 13 hrs 6 mins
Moon Transit: 7:26 AM
Moonset: 12:02 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%
Best Times for Fishing or Hunting
Major Periods
6:56 AM - 9:26 AM7:32 PM - 10:02 PM
Minor Periods
11:32 AM - 1:02 PM2:27 AM - 3:57 AM
Action Rating: 3 out of 5
Flood Warning issued April 9 at 9:21PM CDT by NWS Chicago IL
Effective: Thu April 9, 2026, 9:21 PM
Expires: Fri April 10, 2026, 3:30 PM
...The Flood Warning continues for the following rivers in Illinois... Illinois River at La Salle affecting La Salle, Putnam and Bureau Counties. For the Illinois River (Upper)...including La Salle...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until further notice. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 8:45 PM CDT Thursday the stage was 20.2 feet. - Forecast...The river is expected to remain near 20 feet through early next week. - Flood stage is 20.0 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 Friday afternoon.
Flood Warning issued April 9 at 9:12PM CDT by NWS Chicago IL
Effective: Thu April 9, 2026, 9:12 PM
Expires: Fri April 10, 2026, 3:15 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL 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 Thursday the stage was 9.8 feet. - Forecast...The river is expected to slowly rise to just above 10 feet by Friday afternoon and evening before gradually falling into 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 Friday afternoon.
Flood Warning issued April 10 at 9:52AM CDT by NWS Chicago IL
Effective: Fri April 10, 2026, 9:52 AM
Expires: Sat April 11, 2026, 4:00 AM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane 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 10.0 feet, Winaki Trail and Onaway Trail are threatened south of Algonquin. Athletic fields inundated at Judson College in Elgin. * ADDITIONAL DETAILS... - At 9:30 AM CDT Friday the stage was 9.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 AM CDT Friday was 10.0 feet. - Forecast...The river is expected to rise to a crest of 10.1 feet this evening before gradually falling into 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: 5.93 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 83.52 μg/m3
Astronomical
Sun Transit: 12:55 AM
Sunset: 7:29 PM
Daylight: 13 hrs 6 mins
Moon Transit: 7:26 AM
Moonset: 12:02 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%
Best Times for Fishing or Hunting
Major Periods
6:56 AM - 9:26 AM7:32 PM - 10:02 PM
Minor Periods
11:32 AM - 1:02 PM2:27 AM - 3:57 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.91 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 79.88 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: 3.94 μg/m3
Sulphur Dioxide: 3.77 μg/m3
Ozone: 96.52 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: 3.81 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 88.36 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: 4.1 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 74 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