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

5.9°F
Sunny
Sunny
-4.7°F
6.8°F
63%
NNW 5.8 mph
7.4 mph
-3.1°F
-4.6°F
0 in
0%
9 mi
1028 mbar
1.3

Five Day Weather Forecast

Sunny
Thu
H: 21°F
L: 1°F
Partly Cloudy
Fri
H: 18°F
L: 0°F
Sunny
Sat
H: 29°F
L: 6°F
Light freezing rain
Sun
H: 32°F
L: 4°F
Patchy moderate snow
Mon
H: 31°F
L: 17°F

Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 5.25 μg/m3
Carbon Monoxide: 212.85 μg/m3
Nitrogen Dioxide: 8.95 μg/m3
Sulphur Dioxide: 2.85 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:07 AM
Sunset: 5:07 PM
Daylight: 9 hrs 59 mins
Moonrise: 1:17 PM
Moon Transit: 9:30 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
9:00 PM - 11:30 PM

Minor Periods

12:47 AM - 2:17 PM
4:09 AM - 5:39 AM

Action Rating: 2 out of 5

Flood Advisory issued January 28 at 7:48PM CST by NWS Chicago IL

Effective: Wed January 28, 2026, 7:48 PM
Expires: Thu January 29, 2026, 2:00 PM

...The Flood Advisory continues for the following rivers in Illinois... Kankakee River at Momence affecting Kankakee County. For the Kankakee River...including Momence...elevated river levels are forecast. * WHAT...Flooding caused by an ice jam continues. * WHERE...Kankakee River from IL/IN state line downstream to confluence with Iroquois River at Aroma Park, including the Momence gauge. * WHEN...Until further notice. * IMPACTS...Localized flooding of wetlands, forest land, agricultural land, and roadways may occur along the river. * ADDITIONAL DETAILS... - At 6:45 PM CST Wednesday the stage was 4.6 feet. The indicated stage was effected by an ice jam downstream of the gauge. - Forecast...The river is expected to remain near to just below flood stage while the ice jam is in place, with local water level fluctuations possible. - Flood stage is 5.0 feet. - http://www.weather.gov/safety/flood

An ice jam is affecting water levels in this area. River forecasts during ice jams are less certain due to many complicated factors. Significant river ice cover can cause large water level fluctuations and flooding with little advanced notice. River ice may also cause gauge observations to be inaccurate. Additional information is available at www.weather.gov. The next statement will be issued by Thursday afternoon.
Thursday, January 29, 2026

Weather Forecast

Sunny
21°F
1°F
8.9°F
59%
0 in
0%
0%
6.5 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.23 μg/m3
PM10: 8.57 μg/m3
Carbon Monoxide: 209.41 μg/m3
Nitrogen Dioxide: 8.41 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 60.4 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:07 AM
Sunset: 5:07 PM
Daylight: 9 hrs 59 mins
Moonrise: 1:17 PM
Moon Transit: 9:30 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
9:00 PM - 11:30 PM

Minor Periods

12:47 AM - 2:17 PM
4:09 AM - 5:39 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Partly Cloudy
18.1°F
0.3°F
8.9°F
78%
0 in
0%
0%
14.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.03 μg/m3
PM10: 8.31 μg/m3
Carbon Monoxide: 232.65 μg/m3
Nitrogen Dioxide: 12.98 μg/m3
Sulphur Dioxide: 2.77 μg/m3
Ozone: 53.68 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:07 AM
Sunset: 5:08 PM
Daylight: 10 hrs 1 mins
Moonrise: 2:28 PM
Moon Transit: 10:34 PM
Moonset: 5:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

9:44 AM - 12:14 AM
12:00 AM - 12:00 AM

Minor Periods

1:58 PM - 3:28 PM
5:11 AM - 6:41 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Sunny
28.9°F
5.9°F
14.2°F
74%
0 in
0%
0%
15 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 4.14 μg/m3
PM10: 4.31 μg/m3
Carbon Monoxide: 175.73 μg/m3
Nitrogen Dioxide: 7.15 μg/m3
Sulphur Dioxide: 2.29 μg/m3
Ozone: 64.44 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:07 AM
Sunset: 5:10 PM
Daylight: 10 hrs 3 mins
Moonrise: 3:45 PM
Moon Transit: 11:33 PM
Moonset: 6:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

10:46 AM - 1:16 PM
12:00 AM - 12:00 AM

Minor Periods

3:15 PM - 4:45 PM
6:01 AM - 7:31 AM

Action Rating: 4 out of 5

Sunday, February 1, 2026

Weather Forecast

Light freezing rain
31.8°F
3.6°F
15.5°F
81%
0.01 in
71%
5%
11.4 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 9.81 μg/m3
PM10: 10.21 μg/m3
Carbon Monoxide: 209.69 μg/m3
Nitrogen Dioxide: 14.26 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 49.72 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:08 AM
Sunset: 5:11 PM
Daylight: 10 hrs 5 mins
Moonrise: 5:03 PM
Moon Transit: 12:00 AM
Moonset: 7:09 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:43 AM - 2:13 PM

Minor Periods

4:33 PM - 6:03 PM
6:39 AM - 8:09 AM

Action Rating: 4 out of 5

Monday, February 2, 2026

Weather Forecast

Patchy moderate snow
30.6°F
17.2°F
23.1°F
89%
0.03 in
60%
27%
10.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 10.83 μg/m3
PM10: 11.31 μg/m3
Carbon Monoxide: 230.76 μg/m3
Nitrogen Dioxide: 10.02 μg/m3
Sulphur Dioxide: 2.2 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:08 AM
Sunset: 5:12 PM
Daylight: 10 hrs 8 mins
Moonrise: 6:19 PM
Moon Transit: 12:28 AM
Moonset: 7:39 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:35 AM - 3:05 PM

Minor Periods

5:49 PM - 7:19 PM
7:09 AM - 8:39 AM

Action Rating: 4 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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