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

61°F
Occasional Rain Showers
Occasional Rain Showers
88%
E 5 mph
57°F

Weather Forecast

Occasional Rain Showers
Overnight
59°F - Occasional Rain Showers
Occasional Rain Showers then Mostly Cloudy
Friday
69°F - Occasional Rain Showers then Mostly Cloudy
Partly Cloudy
Friday Night
52°F - Partly Cloudy
Mostly Sunny
Saturday
71°F - Mostly Sunny
Partly Cloudy
Saturday Night
52°F - Partly Cloudy
Mostly Sunny
Sunday
71°F - Mostly Sunny
Partly Cloudy
Sunday Night
52°F - Partly Cloudy
Sunny
Monday
73°F - Sunny
Mostly Clear
Monday Night
55°F - Mostly Clear
Mostly Sunny then Slight Chance Rain Showers
Tuesday
74°F - Mostly Sunny then Slight Chance Rain Showers
Rain Showers Likely
Tuesday Night
62°F - Rain Showers Likely
Rain Showers Likely
Wednesday
74°F - Rain Showers Likely
Chance Showers And Thunderstorms
Wednesday Night
62°F - Chance Showers And Thunderstorms
Chance Rain Showers
Thursday
75°F - Chance Rain Showers

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:46 AM
Sunset: 6:47 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:12 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:42 PM - 7:12 PM
5:02 AM - 6:32 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:45 AM
Sun Transit: 12:46 AM
Sunset: 6:47 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:12 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:42 PM - 7:12 PM
5:02 AM - 6:32 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:45 AM
Sun Transit: 12:46 AM
Sunset: 6:47 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:12 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:42 PM - 7:12 PM
5:02 AM - 6:32 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:45 AM
Sun Transit: 12:46 AM
Sunset: 6:47 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:12 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:42 PM - 7:12 PM
5:02 AM - 6:32 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:46 AM
Sun Transit: 12:45 AM
Sunset: 6:45 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:34 PM
Moon Transit: 7:33 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:04 PM - 7:34 PM
6:11 AM - 7:41 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:46 AM
Sun Transit: 12:45 AM
Sunset: 6:45 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:34 PM
Moon Transit: 7:33 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:04 PM - 7:34 PM
6:11 AM - 7:41 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:47 AM
Sun Transit: 12:45 AM
Sunset: 6:43 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:57 PM
Moon Transit: 1:05 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:35 AM - 3:05 AM
1:10 PM - 3:40 PM

Minor Periods

6:27 PM - 7:57 PM
7:21 AM - 8:51 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:47 AM
Sun Transit: 12:45 AM
Sunset: 6:43 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:57 PM
Moon Transit: 1:05 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:35 AM - 3:05 AM
1:10 PM - 3:40 PM

Minor Periods

6:27 PM - 7:57 PM
7:21 AM - 8:51 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:48 AM
Sun Transit: 12:45 AM
Sunset: 6:41 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:25 PM
Moon Transit: 1:54 AM
Moonset: 9:04 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
2:01 PM - 4:31 PM

Minor Periods

6:55 PM - 8:25 PM
8:34 AM - 10:04 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:48 AM
Sun Transit: 12:45 AM
Sunset: 6:41 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:25 PM
Moon Transit: 1:54 AM
Moonset: 9:04 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
2:01 PM - 4:31 PM

Minor Periods

6:55 PM - 8:25 PM
8:34 AM - 10:04 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:49 AM
Sun Transit: 12:44 AM
Sunset: 6:40 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:46 AM
Moonset: 10:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:16 AM - 4:46 AM
2:55 PM - 5:25 PM

Minor Periods

7:29 PM - 8:59 PM
9:51 AM - 11:21 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:49 AM
Sun Transit: 12:44 AM
Sunset: 6:40 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:46 AM
Moonset: 10:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:16 AM - 4:46 AM
2:55 PM - 5:25 PM

Minor Periods

7:29 PM - 8:59 PM
9:51 AM - 11:21 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:50 AM
Sun Transit: 12:44 AM
Sunset: 6:38 PM
Daylight: 11 hrs 48 mins
Moonrise: 8:42 PM
Moon Transit: 3:42 AM
Moonset: 11:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:12 AM - 5:42 AM
3:53 PM - 6:23 PM

Minor Periods

8:12 PM - 9:42 PM
11:07 AM - 12:37 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:50 AM
Sun Transit: 12:44 AM
Sunset: 6:38 PM
Daylight: 11 hrs 48 mins
Moonrise: 8:42 PM
Moon Transit: 3:42 AM
Moonset: 11:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:12 AM - 5:42 AM
3:53 PM - 6:23 PM

Minor Periods

8:12 PM - 9:42 PM
11:07 AM - 12:37 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:51 AM
Sun Transit: 12:44 AM
Sunset: 6:36 PM
Daylight: 11 hrs 45 mins
Moonrise: 9:35 PM
Moon Transit: 4:42 AM
Moonset: 12:51 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
4:55 PM - 7:25 PM

Minor Periods

9:05 PM - 10:35 PM
12:21 AM - 1:51 PM

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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