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

63°F
Sunny
Sunny
63°F
67.7°F
36%
S 3.4 mph
3.9 mph
66.6°F
35.7°F
0 in
0%
9 mi
1019 mbar
7.3

Five Day Weather Forecast

Sunny
Thu
H: 77°F
L: 39°F
Moderate rain
Fri
H: 75°F
L: 52°F
Moderate rain
Sat
H: 83°F
L: 63°F
Heavy rain
Sun
H: 84°F
L: 65°F
Moderate rain
Mon
H: 76°F
L: 68°F

Air Quality

AQI: 1 - Good
PM2.5: 6.95 μg/m3
PM10: 8.65 μg/m3
Carbon Monoxide: 141.85 μg/m3
Nitrogen Dioxide: 2.15 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:50 AM
Sunset: 8:06 PM
Daylight: 14 hrs 29 mins
Moonrise: 3:54 AM
Moon Transit: 10:46 AM
Moonset: 5:52 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:22 PM - 6:52 PM
3:24 AM - 4:54 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
76.6°F
39.4°F
58.5°F
43%
0 in
0%
0%
8.1 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 5.8 μg/m3
PM10: 6.65 μg/m3
Carbon Monoxide: 158.05 μg/m3
Nitrogen Dioxide: 10.87 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 67.8 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:50 AM
Sunset: 8:06 PM
Daylight: 14 hrs 29 mins
Moonrise: 3:54 AM
Moon Transit: 10:46 AM
Moonset: 5:52 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:22 PM - 6:52 PM
3:24 AM - 4:54 AM

Action Rating: 2 out of 5

Friday, May 15, 2026

Weather Forecast

Moderate rain
74.7°F
52.3°F
61.5°F
71%
0.36 in
90%
0%
15.4 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 7.39 μg/m3
PM10: 8.08 μg/m3
Carbon Monoxide: 149.73 μg/m3
Nitrogen Dioxide: 4.98 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 85.24 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:50 AM
Sunset: 8:07 PM
Daylight: 14 hrs 31 mins
Moonrise: 4:23 AM
Moon Transit: 11:40 AM
Moonset: 7:13 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:10 AM - 1:40 PM

Minor Periods

6:43 PM - 8:13 PM
3:53 AM - 5:23 AM

Action Rating: 5 out of 5

Saturday, May 16, 2026

Weather Forecast

Moderate rain
82.7°F
63.2°F
72.3°F
77%
0.46 in
87%
0%
12.5 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 6.45 μg/m3
PM10: 7.03 μg/m3
Carbon Monoxide: 165.6 μg/m3
Nitrogen Dioxide: 5.22 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 87.56 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:50 AM
Sunset: 8:08 PM
Daylight: 14 hrs 33 mins
Moonrise: 4:57 AM
Moon Transit: 12:39 AM
Moonset: 8:35 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

8:05 PM - 9:35 PM
4:27 AM - 5:57 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Heavy rain
84.3°F
65.4°F
73.6°F
75%
0.83 in
87%
0%
19.5 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 7.72 μg/m3
PM10: 8.84 μg/m3
Carbon Monoxide: 207.74 μg/m3
Nitrogen Dioxide: 10.81 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 73.28 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 12:50 AM
Sunset: 8:09 PM
Daylight: 14 hrs 35 mins
Moonrise: 5:42 AM
Moon Transit: 1:44 PM
Moonset: 9:54 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:53 AM - 3:23 AM
1:14 PM - 3:44 PM

Minor Periods

9:24 PM - 10:54 PM
5:12 AM - 6:42 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Moderate rain
75.7°F
67.6°F
71.1°F
78%
0.62 in
82%
0%
21.3 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 6.94 μg/m3
PM10: 8.27 μg/m3
Carbon Monoxide: 180.62 μg/m3
Nitrogen Dioxide: 4.07 μg/m3
Sulphur Dioxide: 1.77 μg/m3
Ozone: 93.77 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 12:50 AM
Sunset: 8:10 PM
Daylight: 14 hrs 37 mins
Moonrise: 6:39 AM
Moon Transit: 2:51 PM
Moonset: 11:03 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:59 AM - 4:29 AM
2:21 PM - 4:51 PM

Minor Periods

12:00 AM - 12:00 AM
6:09 AM - 7:39 AM

Action Rating: 3 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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