Water Temperature of the Illinois River in Seneca, IL

Current Water Temperature

52.7°F 11.5°C
Cold Thermal Gear Required
52.7°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Thursday, November 12, 2026, 11:45 PM CST

Temperature Locations

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Illinois River

Station Name: ILLINOIS RIVER AT SENECA, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 499 feet

Nearest Address:
511 N 2553rd Rd
Seneca, IL 61341
La Salle County

GPS Coordinates: 41.2997222, -88.6141667

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 (37.1 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

37.2°F
Overcast
Conditions: Overcast
Humidity: 71%
Feels Like: 27.9°F
Wind: N 11.9 mph
Wind Gusts: 23.1 mph
Pressure: 30.06 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 13.4 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Fri
H: 44°F
L: 29°F
Sunny
Sat
H: 48°F
L: 26°F
Partly Cloudy
Sun
H: 49°F
L: 33°F
Partly Cloudy
Mon
H: 52°F
L: 36°F
Overcast
Tue
H: 55°F
L: 38°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.1 μg/m³
Good
PM10
2.4 μg/m³
Good
Ozone (O3)
58 μg/m³
Photochemical
NO2
2.9 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
121 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 56m daylight
Sunrise 6:41 AM
Solar Noon 11:38 AM
Sunset 4:37 PM
Moon
Waxing Crescent • 13%
Moonrise 10:54 AM
Transit 3:17 PM
Moonset 7:44 PM

Best Times for Fishing or Hunting

Major Periods

2:21 AM - 4:51 AM
2:47 PM - 5:17 PM

Minor Periods

10:24 AM - 11:54 AM
7:14 PM - 8:44 PM
Action Rating:
Fair Action 2/5
Friday, November 13, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 38.8°F
Average Humidity: 65%
Chance of Rain: 1%
Wind: 13.9 mph
UV Index: 2.9

Air Quality

EPA Index 1 • Good
PM2.5
1.5 μg/m³
Good
PM10
1.7 μg/m³
Good
Ozone (O3)
62.3 μg/m³
Photochemical
NO2
2.9 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
123.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 56m daylight
Sunrise 6:41 AM
Solar Noon 11:38 AM
Sunset 4:37 PM
Moon
Waxing Crescent • 13%
Moonrise 10:54 AM
Transit 3:17 PM
Moonset 7:44 PM

Best Times for Fishing or Hunting

Major Periods

2:21 AM - 4:51 AM
2:47 PM - 5:17 PM

Minor Periods

10:24 AM - 11:54 AM
7:14 PM - 8:44 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 35.4°F
Average Humidity: 73%
Chance of Rain: 1%
Wind: 9 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
2.3 μg/m³
Good
PM10
2.4 μg/m³
Good
Ozone (O3)
46.6 μg/m³
Photochemical
NO2
7 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
140 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 54m daylight
Sunrise 6:42 AM
Solar Noon 11:38 AM
Sunset 4:36 PM
Moon
Waxing Crescent • 21%
Moonrise 11:31 AM
Transit 4:05 PM
Moonset 8:46 PM

Best Times for Fishing or Hunting

Major Periods

3:11 AM - 5:41 AM
3:35 PM - 6:05 PM

Minor Periods

11:01 AM - 12:31 PM
8:16 PM - 9:46 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 40.3°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 4.4 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
6.1 μg/m³
Good
PM10
6.4 μg/m³
Good
Ozone (O3)
32.6 μg/m³
Photochemical
NO2
17.3 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
176.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 52m daylight
Sunrise 6:43 AM
Solar Noon 11:39 AM
Sunset 4:35 PM
Moon
Waxing Crescent • 31%
Moonrise 12:03 PM
Transit 4:52 PM
Moonset 9:48 PM

Best Times for Fishing or Hunting

Major Periods

3:59 AM - 6:29 AM
4:22 PM - 6:52 PM

Minor Periods

11:33 AM - 1:03 PM
9:18 PM - 10:48 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 43°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 6.8 mph
UV Index: 3

Air Quality

EPA Index 2 • Moderate
PM2.5
11.2 μg/m³
Good
PM10
11.4 μg/m³
Good
Ozone (O3)
27.3 μg/m³
Photochemical
NO2
23.1 μg/m³
Nitrogen Dioxide
SO2
2.1 μg/m³
Sulfur Dioxide
CO
244.1 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 50m daylight
Sunrise 6:44 AM
Solar Noon 11:39 AM
Sunset 4:34 PM
Moon
First Quarter • 42%
Moonrise 12:29 PM
Transit 5:36 PM
Moonset 10:52 PM

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
5:06 PM - 7:36 PM

Minor Periods

11:59 AM - 1:29 PM
10:22 PM - 11:52 PM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.1°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 9.1 mph
UV Index: 2.9

Air Quality

EPA Index 2 • Moderate
PM2.5
9 μg/m³
Good
PM10
9 μg/m³
Good
Ozone (O3)
41.3 μg/m³
Photochemical
NO2
9.7 μg/m³
Nitrogen Dioxide
SO2
2.2 μg/m³
Sulfur Dioxide
CO
216.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 48m daylight
Sunrise 6:45 AM
Solar Noon 11:39 AM
Sunset 4:34 PM
Moon
First Quarter • 54%
Moonrise 12:53 PM
Transit 6:19 PM
Moonset 11:56 PM

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
5:49 PM - 8:19 PM

Minor Periods

12:23 PM - 1:53 PM
11:26 PM - 12:56 AM
Action Rating:
Fair Action 2/5
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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