Water Temperature of the Illinois River in Seneca, IL

Current Water Temperature

55.4°F 13.0°C
Cold Thermal Gear Required
55.4°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: Monday, November 9, 2026, 10:45 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

47.2°F
Clear
Conditions: Clear
Humidity: 92%
Feels Like: 44.4°F
Wind: NW 6 mph
Wind Gusts: 7.7 mph
Pressure: 30.02 in
Precipitation: 0 in
Cloud Cover: 3%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Sunny
Tue
H: 63°F
L: 45°F
Overcast
Wed
H: 63°F
L: 44°F
Sunny
Thu
H: 46°F
L: 34°F

Air Quality

EPA Index 1 • Good

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

PM2.5
6.4 μg/m³
Good
PM10
6.7 μg/m³
Good
Ozone (O3)
23 μg/m³
Photochemical
NO2
10.5 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
176 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 3m daylight
Sunrise 6:37 AM
Solar Noon 11:38 AM
Sunset 4:40 PM
Moon
New • 0%
Moonrise 8:15 AM
Transit 12:43 PM
Moonset 5:08 PM

Best Times for Fishing or Hunting

Major Periods

12:13 PM - 2:43 PM
11:48 PM - 2:18 AM

Minor Periods

7:45 AM - 9:15 AM
4:38 PM - 6:08 PM
Action Rating:
Very Good 4/5
Tuesday, November 10, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 52.4°F
Average Humidity: 67%
Chance of Rain: 6%
Wind: 8.7 mph
UV Index: 2.5

Astronomical

Sun
10h 3m daylight
Sunrise 6:37 AM
Solar Noon 11:38 AM
Sunset 4:40 PM
Moon
New • 0%
Moonrise 8:15 AM
Transit 12:43 PM
Moonset 5:08 PM

Best Times for Fishing or Hunting

Major Periods

12:13 PM - 2:43 PM
11:48 PM - 2:18 AM

Minor Periods

7:45 AM - 9:15 AM
4:38 PM - 6:08 PM
Action Rating:
Very Good 4/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 51.3°F
Average Humidity: 74%
Chance of Rain: 64%
Wind: 14.3 mph
UV Index: 1.5

Astronomical

Sun
10h 1m daylight
Sunrise 6:38 AM
Solar Noon 11:38 AM
Sunset 4:39 PM
Moon
New • 2%
Moonrise 9:15 AM
Transit 1:34 PM
Moonset 5:54 PM

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
1:04 PM - 3:34 PM

Minor Periods

8:45 AM - 10:15 AM
5:24 PM - 6:54 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 41.4°F
Average Humidity: 68%
Chance of Rain: 36%
Wind: 15.7 mph
UV Index: 1.2

Astronomical

Sun
9h 58m daylight
Sunrise 6:39 AM
Solar Noon 11:38 AM
Sunset 4:38 PM
Moon
Waxing Crescent • 6%
Moonrise 10:08 AM
Transit 2:26 PM
Moonset 6:46 PM

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
1:56 PM - 4:26 PM

Minor Periods

9:38 AM - 11:08 AM
6:16 PM - 7:46 PM
Action Rating:
Good Action 3/5
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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