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

41.2°F
Clear
Clear
39.1°F
42.3°F
81%
NNW 3.6 mph
6.4 mph
40.3°F
34.9°F
0 in
0%
9 mi
1017 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 59°F
L: 39°F
Patchy rain nearby
Fri
H: 54°F
L: 37°F
Patchy rain nearby
Sat
H: 55°F
L: 39°F
Moderate rain
Sun
H: 60°F
L: 41°F
Sunny
Mon
H: 74°F
L: 48°F

Air Quality

PM2.5: 7.75 μg/m3
PM10: 8.05 μg/m3
Carbon Monoxide: 182.85 μg/m3
Nitrogen Dioxide: 8.85 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 45 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:51 AM
Sunset: 7:51 PM
Daylight: 13 hrs 58 mins
Moonrise: 7:15 PM
Moon Transit: 12:00 AM
Moonset: 5:01 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

6:45 PM - 8:15 PM
4:31 AM - 6:01 AM

Action Rating: 5 out of 5

Flood Warning issued April 29 at 8:44AM CDT by NWS Chicago IL

Effective: Wed April 29, 2026, 8:44 AM
Expires: Thu April 30, 2026, 2:45 AM

...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...Moderate flooding is occurring and is forecasted to continue. * 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 11.5 feet, Residences threatened along Oceola Drive in Algonquin. A few residences threatened along McBride Street in Elgin. Jayne Street and Beach Drive threatened in Algonquin. River Street threatened in East Dundee. Jerusha Avenue threatened in Elgin. Fox River Trail threatened between East Dundee and Elgin. * ADDITIONAL DETAILS... - At 8:30 AM CDT Wednesday the stage was 11.4 feet. - Recent Activity...The river stage continues a gradual slow fall. - Forecast...The river is expected to continue a gradual slow 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.
Thursday, April 30, 2026

Weather Forecast

Patchy rain nearby
59°F
38.8°F
47.6°F
70%
0.04 in
88%
0%
10.3 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 6.41 μg/m3
PM10: 6.75 μg/m3
Carbon Monoxide: 172.57 μg/m3
Nitrogen Dioxide: 4.43 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 80.52 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:51 AM
Sunset: 7:51 PM
Daylight: 13 hrs 58 mins
Moonrise: 7:15 PM
Moon Transit: 12:00 AM
Moonset: 5:01 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

6:45 PM - 8:15 PM
4:31 AM - 6:01 AM

Action Rating: 5 out of 5

Friday, May 1, 2026

Weather Forecast

Patchy rain nearby
54.1°F
37.1°F
46.6°F
64%
0.01 in
87%
0%
9.6 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 3.07 μg/m3
PM10: 3.31 μg/m3
Carbon Monoxide: 167.66 μg/m3
Nitrogen Dioxide: 3.54 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 72.68 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:51 AM
Sunset: 7:52 PM
Daylight: 14 hrs mins
Moonrise: 8:20 PM
Moon Transit: 12:23 AM
Moonset: 5:24 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:27 AM - 2:57 PM

Minor Periods

7:50 PM - 9:20 PM
4:54 AM - 6:24 AM

Action Rating: 4 out of 5

Saturday, May 2, 2026

Weather Forecast

Patchy rain nearby
55°F
39.3°F
47.4°F
61%
0.02 in
89%
0%
9.8 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 5.47 μg/m3
Carbon Monoxide: 158.02 μg/m3
Nitrogen Dioxide: 4.61 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 70.36 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:51 AM
Sunset: 7:53 PM
Daylight: 14 hrs 3 mins
Moonrise: 9:23 PM
Moon Transit: 1:09 AM
Moonset: 5:52 AM
Moon Phase: Full
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
1:14 PM - 3:44 PM

Minor Periods

8:53 PM - 10:23 PM
5:22 AM - 6:52 AM

Action Rating: 4 out of 5

Sunday, May 3, 2026

Weather Forecast

Moderate rain
59.8°F
40.5°F
50.8°F
68%
0.21 in
79%
0%
15.2 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 6.08 μg/m3
PM10: 6.8 μg/m3
Carbon Monoxide: 177.47 μg/m3
Nitrogen Dioxide: 8.99 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 66.38 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:51 AM
Sunset: 7:54 PM
Daylight: 14 hrs 5 mins
Moonrise: 10:25 PM
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 AM
2:03 PM - 4:33 PM

Minor Periods

9:55 PM - 11:25 PM
5:56 AM - 7:26 AM

Action Rating: 4 out of 5

Monday, May 4, 2026

Weather Forecast

Sunny
73.5°F
48.2°F
57.9°F
75%
0 in
0%
0%
14.8 mph
0.3


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:51 AM
Sunset: 7:55 PM
Daylight: 14 hrs 7 mins
Moonrise: 11:22 PM
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 AM
2:54 PM - 5:24 PM

Minor Periods

12:00 AM - 12:00 AM
6:36 AM - 8:06 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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