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

65.7°F
Partly cloudy
Partly cloudy
65.7°F
71.6°F
32%
W 7.8 mph
9.6 mph
70.1°F
39.1°F
0 in
75%
9 mi
1021 mbar
5.4

Five Day Weather Forecast

Sunny
Thu
H: 80°F
L: 54°F
Moderate rain
Fri
H: 57°F
L: 43°F
Cloudy
Sat
H: 59°F
L: 40°F
Patchy rain nearby
Sun
H: 77°F
L: 57°F
Patchy rain nearby
Mon
H: 73°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 14.45 μg/m3
PM10: 17.75 μg/m3
Carbon Monoxide: 173.85 μg/m3
Nitrogen Dioxide: 4.65 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 104 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:55 AM
Sunset: 7:28 PM
Daylight: 13 hrs 4 mins
Moonrise: 2:17 AM
Moon Transit: 6:36 AM
Moonset: 10:59 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:06 AM - 8:36 AM
6:43 PM - 9:13 PM

Minor Periods

10:29 AM - 11:59 AM
1:47 AM - 3:17 AM

Action Rating: 3 out of 5

Flood Warning issued April 8 at 9:36PM CDT until April 10 at 1:00AM CDT by NWS Chicago IL

Effective: Wed April 8, 2026, 9:36 PM
Expires: Thu April 9, 2026, 3:45 PM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at La Salle affecting Bureau, La Salle and Putnam Counties. * 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 early Friday morning. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 8:45 PM CDT Wednesday the stage was 20.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Wednesday was 21.4 feet. - Forecast...The river is expected to fall below flood stage Thursday evening. - 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 Thursday afternoon.


Flood Warning issued April 8 at 9:09PM CDT until April 12 at 1:00AM CDT by NWS Chicago IL

Effective: Wed April 8, 2026, 9:09 PM
Expires: Thu April 9, 2026, 3:15 PM

...The Flood Warning is extended for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Kane and Lake IL Counties. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River at Lincolnshire affecting Lake IL and Cook Counties. ...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River at Shelby...Moderate 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 early Sunday morning. * IMPACTS...At 9.5 feet, Fox River Drive threatened in East Dundee. Boathouses threatened along the river in Cary. * ADDITIONAL DETAILS... - At 8:30 PM CDT Wednesday the stage was 9.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Wednesday was 9.7 feet. - Forecast...The river is near crest and will fall below flood stage Saturday evening. - 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 Thursday afternoon.
Thursday, April 9, 2026

Weather Forecast

Sunny
79.5°F
54°F
65.6°F
42%
0 in
0%
0%
21.5 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 8.94 μg/m3
PM10: 10.16 μg/m3
Carbon Monoxide: 169.33 μg/m3
Nitrogen Dioxide: 4.23 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 93.88 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:55 AM
Sunset: 7:28 PM
Daylight: 13 hrs 4 mins
Moonrise: 2:17 AM
Moon Transit: 6:36 AM
Moonset: 10:59 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:06 AM - 8:36 AM
6:43 PM - 9:13 PM

Minor Periods

10:29 AM - 11:59 AM
1:47 AM - 3:17 AM

Action Rating: 3 out of 5

Friday, April 10, 2026

Weather Forecast

Moderate rain
56.8°F
42.6°F
53.3°F
82%
0.54 in
87%
0%
12.3 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 9.09 μg/m3
PM10: 10.01 μg/m3
Carbon Monoxide: 191.49 μg/m3
Nitrogen Dioxide: 7.19 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 84.12 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:55 AM
Sunset: 7:29 PM
Daylight: 13 hrs 6 mins
Moonrise: 2:57 AM
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 AM
7:32 PM - 10:02 PM

Minor Periods

11:32 AM - 1:02 PM
2:27 AM - 3:57 AM

Action Rating: 3 out of 5

Saturday, April 11, 2026

Weather Forecast

Cloudy
59.4°F
39.6°F
50.6°F
71%
0 in
0%
0%
10.7 mph
1.2


Air Quality

AQI: 1 - Good
PM2.5: 10.34 μg/m3
PM10: 11.42 μg/m3
Carbon Monoxide: 206.53 μg/m3
Nitrogen Dioxide: 9.23 μg/m3
Sulphur Dioxide: 3.72 μg/m3
Ozone: 77.24 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 12:55 AM
Sunset: 7:30 PM
Daylight: 13 hrs 9 mins
Moonrise: 3:30 AM
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 AM
8:20 PM - 10:50 PM

Minor Periods

12:38 AM - 2:08 PM
3:00 AM - 4:30 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Patchy rain nearby
77.2°F
56.7°F
63.9°F
79%
0.04 in
89%
0%
23.7 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 8.84 μg/m3
PM10: 9.24 μg/m3
Carbon Monoxide: 174.55 μg/m3
Nitrogen Dioxide: 4.3 μg/m3
Sulphur Dioxide: 3.82 μg/m3
Ozone: 90.84 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
73.3°F
62.5°F
68.1°F
80%
0.06 in
87%
0%
20.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.13 μg/m3
PM10: 4.32 μg/m3
Carbon Monoxide: 151.6 μg/m3
Nitrogen Dioxide: 4.08 μg/m3
Sulphur Dioxide: 2.16 μg/m3
Ozone: 89.15 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

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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