Weather for Seneca, Illinois
Current Weather
Five Day Weather Forecast
Sun
H: 63°F
L: 43°F
Mon
H: 75°F
L: 49°F
Tue
H: 53°F
L: 44°F
Wed
H: 58°F
L: 39°F
Thu
H: 59°F
L: 41°F
Air Quality
Nitrogen Dioxide: 5.75 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 71 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:54 PM
Daylight: 14 hrs 5 mins
Moon Transit: 1:57 AM
Moonset: 6:26 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:27 AM - 3:57 AM2:03 PM - 4:33 PM
Minor Periods
9:55 PM - 11:25 PM5:56 AM - 7:26 AM
Action Rating: 4 out of 5
Flood Warning issued May 2 at 9:44AM CDT until May 5 at 7:00AM CDT by NWS Chicago IL
Effective: Sat May 2, 2026, 9:44 AM
Expires: Sun May 3, 2026, 3:45 AM
...The Flood Warning is extended for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. * WHAT...Moderate flooding is occurring and moderate 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 Tuesday morning. * IMPACTS...At 10.5 feet, Structures threatened along Fox River Drive in East Dundee. Parking lots threatened in downtown West Dundee. Low-lying sections of Cornish Park are inundated in Algonquin. Low-lying sections of Trout Park inundated north of Elgin. * ADDITIONAL DETAILS... - At 9:30 AM CDT Saturday the stage was 10.6 feet. - Forecast...The river is expected to continue a gradual fall. - 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.
Flood Warning issued May 2 at 7:00PM CDT until May 5 at 4:00AM CDT by NWS Chicago IL
Effective: Sat May 2, 2026, 7:00 PM
Expires: Sun May 3, 2026, 1:00 PM
...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Kane and Lake IL Counties. * 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 Tuesday morning. * IMPACTS...At 10.5 feet, Structures threatened along Fox River Drive in East Dundee. Parking lots threatened in downtown West Dundee. Low-lying sections of Cornish Park are inundated in Algonquin. Low-lying sections of Trout Park inundated north of Elgin. * ADDITIONAL DETAILS... - At 6:30 PM CDT Saturday the stage was 10.4 feet. - Forecast...The river is expected to continue a gradual fall. - 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 Sunday afternoon.
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.91 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 80.88 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:54 PM
Daylight: 14 hrs 5 mins
Moon Transit: 1:57 AM
Moonset: 6:26 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:27 AM - 3:57 AM2:03 PM - 4:33 PM
Minor Periods
9:55 PM - 11:25 PM5:56 AM - 7:26 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.25 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 80.36 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:55 PM
Daylight: 14 hrs 7 mins
Moon Transit: 2:47 AM
Moonset: 7:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:17 AM - 4:47 AM2:54 PM - 5:24 PM
Minor Periods
12:00 AM - 12:00 AM6:36 AM - 8:06 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.95 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 79.24 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:56 PM
Daylight: 14 hrs 10 mins
Moon Transit: 3:38 AM
Moonset: 7:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
3:08 AM - 5:38 AM3:45 PM - 6:15 PM
Minor Periods
7:24 AM - 8:54 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.45 μg/m3
Sulphur Dioxide: 3.9 μg/m3
Ozone: 74.85 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:57 PM
Daylight: 14 hrs 12 mins
Moon Transit: 4:29 AM
Moonset: 8:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
3:59 AM - 6:29 AM4:36 PM - 7:06 PM
Minor Periods
8:20 AM - 9:50 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 12:51 AM
Sunset: 7:58 PM
Daylight: 14 hrs 14 mins
Moon Transit: 5:19 AM
Moonset: 9:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
4:49 AM - 7:19 AM5:25 PM - 7:55 PM
Minor Periods
9:20 AM - 10:50 AM12:24 AM - 1:54 AM
Action Rating: 3 out of 5