Water Temperature of the Illinois River in Seneca, IL

Current Water Temperature

32.0°F

Measurement Time: Friday, January 23, 2026, 8:45 AM CST

Temperature Locations

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Illinois River

Station Name: Seneca
Data Source: USGS

Elevation Above Sea Level: 499 feet

Nearest Address:
Harbor Lane
Seneca, IL 61360
La Salle County

GPS Coordinates: 41.2997, -88.6142

Nearby Water Temperatures

Illinois River, Seneca, IL (0 mi)
Illinois River, Marseilles, IL (5.5 mi)
Hanson Gravel Pit, Morris, IL (8 mi)
Kankakee River, Morris, IL (19.3 mi)
Illinois River, Utica, IL (19.4 mi)
Des Plaines River, Channahon, IL (22.2 mi)
Kankakee River, Wilmington, IL (22.4 mi)
Kankakee River, Custer Park, IL (25.5 mi)
Des Plaines River, Rockdale, IL (29.7 mi)
Des Plaines River, Joliet, IL (32 mi)
Des Plaines River, Lockport, IL (33.4 mi)
Chicago Sanitary and Ship Canal, Romeoville, IL (37.2 mi)
Illinois River, Henry, IL (40.8 mi)
Cal-Sag Channel, Blue Island, IL (54.6 mi)
Plum Creek, Dyer, IN (59 mi)

Weather for Seneca, Illinois

Current Weather

79.3°F
Partly cloudy
Partly cloudy
79.5°F
81.5°F
40%
SSW 21.3 mph
26.3 mph
81.7°F
55.1°F
0 in
50%
9 mi
1010 mbar
2.9

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 84°F
L: 53°F
Patchy rain nearby
Mon
H: 73°F
L: 62°F
Thundery outbreaks in nearby
Tue
H: 76°F
L: 67°F
Heavy rain
Wed
H: 75°F
L: 66°F
Patchy rain nearby
Thu
H: 75°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 6.45 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 160.85 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 12:55 AM
Sunset: 7:31 PM
Daylight: 13 hrs 12 mins
Moonrise: 3:58 AM
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 AM
9:06 PM - 11:36 PM

Minor Periods

1:46 PM - 3:16 PM
3:28 AM - 4:58 AM

Action Rating: 2 out of 5

Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

Effective: Sat April 11, 2026, 9:24 PM
Expires: Sun April 12, 2026, 3:30 PM

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River near Gurnee affecting Lake IL County. * 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 evening. * 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 Saturday the stage was 9.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 9.9 feet. - Forecast...The river is expected to fall below flood stage early Tuesday afternoon. - 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.


Flood Warning issued April 12 at 10:46AM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

Effective: Sun April 12, 2026, 10:46 AM
Expires: Mon April 13, 2026, 5:00 AM

...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 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 Tuesday evening. * 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 Sunday the stage was 9.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 AM CDT Sunday was 9.9 feet. - Forecast...The river is expected to remain just above flood stage before falling below on Tuesday. - 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.
Sunday, April 12, 2026

Weather Forecast

Patchy rain nearby
83.8°F
53.2°F
67.6°F
62%
0.1 in
88%
0%
21.9 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 7.14 μg/m3
PM10: 7.52 μg/m3
Carbon Monoxide: 169.21 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 4.09 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 12:55 AM
Sunset: 7:31 PM
Daylight: 13 hrs 12 mins
Moonrise: 3:58 AM
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 AM
9:06 PM - 11:36 PM

Minor Periods

1:46 PM - 3:16 PM
3:28 AM - 4:58 AM

Action Rating: 2 out of 5

Monday, April 13, 2026

Weather Forecast

Patchy rain nearby
72.5°F
62.2°F
67.5°F
89%
0.09 in
88%
0%
18.3 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 5.12 μg/m3
PM10: 5.56 μg/m3
Carbon Monoxide: 149.77 μg/m3
Nitrogen Dioxide: 3.93 μg/m3
Sulphur Dioxide: 1.97 μg/m3
Ozone: 89.36 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 12:54 AM
Sunset: 7:32 PM
Daylight: 13 hrs 14 mins
Moonrise: 4:23 AM
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 AM
9:18 AM - 11:48 AM

Minor Periods

2:54 PM - 4:24 PM
3:53 AM - 5:23 AM

Action Rating: 2 out of 5

Tuesday, April 14, 2026

Weather Forecast

Thundery outbreaks in nearby
76.3°F
66.9°F
71.1°F
86%
0 in
0%
0%
20.4 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 4.37 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 147.01 μg/m3
Nitrogen Dioxide: 3.76 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 78.76 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 12:54 AM
Sunset: 7:34 PM
Daylight: 13 hrs 17 mins
Moonrise: 4:45 AM
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 AM
10:04 AM - 12:34 AM

Minor Periods

4:05 PM - 5:35 PM
4:15 AM - 5:45 AM

Action Rating: 2 out of 5

Wednesday, April 15, 2026

Weather Forecast

Heavy rain
75°F
66.4°F
69.3°F
83%
1 in
89%
0%
23.3 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 5.53 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 145.45 μg/m3
Nitrogen Dioxide: 4.38 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 73.92 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 12:54 AM
Sunset: 7:35 PM
Daylight: 13 hrs 20 mins
Moonrise: 5:07 AM
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 AM
10:03 AM - 12:33 AM

Minor Periods

5:17 PM - 6:47 PM
4:37 AM - 6:07 AM

Action Rating: 3 out of 5

Thursday, April 16, 2026

Weather Forecast

Patchy rain nearby
74.9°F
61.7°F
67.1°F
69%
0.12 in
75%
0%
22.6 mph
1.7


Air Quality

AQI: 1 - Good
PM2.5: 3.77 μg/m3
PM10: 3.87 μg/m3
Carbon Monoxide: 147.54 μg/m3
Nitrogen Dioxide: 3.97 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 74.15 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 12:54 AM
Sunset: 7:36 PM
Daylight: 13 hrs 22 mins
Moonrise: 5:30 AM
Moon Transit: 12:09 AM
Moonset: 7:02 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:39 AM - 2:09 PM

Minor Periods

6:32 PM - 8:02 PM
5:00 AM - 6:30 AM

Action Rating: 5 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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