Water Temperature of the Rock River in Byron, IL

Current Water Temperature

63.0°F

Measurement Time: Monday, October 5, 2026, 3:15 PM CDT

Temperature Locations

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Local Points of Interest

River Park East; Hamas Park; Sunshine Park; Byron Forest Preserve District

Rock River

Station Name: ROCK RIVER AT BYRON, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 679 feet

Nearest Address:
State Rte 72
Byron, IL 61010
Ogle County

GPS Coordinates: 42.12218889, -89.2553639

Nearby Water Temperatures

Mississippi River, Fulton, IL (48.7 mi)
Mississippi River, Fulton, IL (48.9 mi)
Beaver Slough, Clinton, IA (52.2 mi)
Fox River, McHenry, IL (53.2 mi)
Mississippi River, Camanche, IA (56.4 mi)
Illinois River, Utica, IL (56.9 mi)
Sugar River, Verona, WI (59 mi)
Mississippi River, Bellevue, IA (60.5 mi)
Badger Mill Creek, Verona, WI (60.8 mi)
Swan Creek, Fitchburg, WI (60.9 mi)
Illinois River, Marseilles, IL (61.7 mi)
Fox River, Burlington, WI (62.5 mi)
Lake Monona, Madison, WI (65.4 mi)
Eagle Spring Lake, Mukwonago, WI (65.6 mi)
Illinois River, Seneca, IL (65.7 mi)

Weather for Byron, Illinois

Current Weather

52°F
Clear
Clear
83%
ESE 5 mph
47°F

Weather Forecast

Mostly Clear
Tonight
47°F - Mostly Clear
Sunny
Tuesday
73°F - Sunny
Mostly Clear
Tuesday Night
53°F - Mostly Clear
Mostly Sunny
Wednesday
77°F - Mostly Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy
Mostly Sunny
Thursday
69°F - Mostly Sunny
Partly Cloudy
Thursday Night
44°F - Partly Cloudy
Mostly Sunny
Friday
69°F - Mostly Sunny
Mostly Clear
Friday Night
46°F - Mostly Clear
Sunny
Saturday
74°F - Sunny
Mostly Clear
Saturday Night
55°F - Mostly Clear
Sunny
Sunday
78°F - Sunny
Partly Cloudy
Sunday Night
53°F - Partly Cloudy
Slight Chance Rain Showers
Columbus Day
70°F - Slight Chance Rain Showers

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:45 AM
Sunset: 6:32 PM
Daylight: 11 hrs 33 mins
Moonrise: 1:07 AM
Moon Transit: 8:46 AM
Moonset: 4:11 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
8:48 PM - 11:18 PM

Minor Periods

3:41 PM - 5:11 PM
12:37 AM - 2:07 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: 6:59 AM
Sun Transit: 12:45 AM
Sunset: 6:32 PM
Daylight: 11 hrs 33 mins
Moonrise: 1:07 AM
Moon Transit: 8:46 AM
Moonset: 4:11 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
8:48 PM - 11:18 PM

Minor Periods

3:41 PM - 5:11 PM
12:37 AM - 2:07 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: 7:00 AM
Sun Transit: 12:45 AM
Sunset: 6:30 PM
Daylight: 11 hrs 30 mins
Moonrise: 2:24 AM
Moon Transit: 9:37 AM
Moonset: 4:38 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:07 AM - 11:37 AM

Minor Periods

4:08 PM - 5:38 PM
1:54 AM - 3:24 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: 7:00 AM
Sun Transit: 12:45 AM
Sunset: 6:30 PM
Daylight: 11 hrs 30 mins
Moonrise: 2:24 AM
Moon Transit: 9:37 AM
Moonset: 4:38 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:07 AM - 11:37 AM

Minor Periods

4:08 PM - 5:38 PM
1:54 AM - 3:24 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: 7:01 AM
Sun Transit: 12:44 AM
Sunset: 6:28 PM
Daylight: 11 hrs 28 mins
Moonrise: 3:37 AM
Moon Transit: 10:26 AM
Moonset: 5:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:56 AM - 12:26 AM

Minor Periods

4:31 PM - 6:01 PM
3:07 AM - 4:37 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: 7:01 AM
Sun Transit: 12:44 AM
Sunset: 6:28 PM
Daylight: 11 hrs 28 mins
Moonrise: 3:37 AM
Moon Transit: 10:26 AM
Moonset: 5:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:56 AM - 12:26 AM

Minor Periods

4:31 PM - 6:01 PM
3:07 AM - 4:37 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: 7:02 AM
Sun Transit: 12:44 AM
Sunset: 6:27 PM
Daylight: 11 hrs 25 mins
Moonrise: 4:49 AM
Moon Transit: 11:11 AM
Moonset: 5:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:41 AM - 1:11 PM

Minor Periods

4:53 PM - 6:23 PM
4:19 AM - 5:49 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: 7:02 AM
Sun Transit: 12:44 AM
Sunset: 6:27 PM
Daylight: 11 hrs 25 mins
Moonrise: 4:49 AM
Moon Transit: 11:11 AM
Moonset: 5:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:41 AM - 1:11 PM

Minor Periods

4:53 PM - 6:23 PM
4:19 AM - 5:49 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: 7:03 AM
Sun Transit: 12:44 AM
Sunset: 6:25 PM
Daylight: 11 hrs 22 mins
Moonrise: 5:58 AM
Moon Transit: 11:56 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:26 AM - 1:56 PM

Minor Periods

5:14 PM - 6:44 PM
5:28 AM - 6:58 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: 7:03 AM
Sun Transit: 12:44 AM
Sunset: 6:25 PM
Daylight: 11 hrs 22 mins
Moonrise: 5:58 AM
Moon Transit: 11:56 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:26 AM - 1:56 PM

Minor Periods

5:14 PM - 6:44 PM
5:28 AM - 6:58 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: 7:04 AM
Sun Transit: 12:43 AM
Sunset: 6:23 PM
Daylight: 11 hrs 19 mins
Moonrise: 7:07 AM
Moon Transit: 12:41 AM
Moonset: 6:06 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:11 AM - 2:41 PM

Minor Periods

5:36 PM - 7:06 PM
6:37 AM - 8:07 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: 7:04 AM
Sun Transit: 12:43 AM
Sunset: 6:23 PM
Daylight: 11 hrs 19 mins
Moonrise: 7:07 AM
Moon Transit: 12:41 AM
Moonset: 6:06 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:11 AM - 2:41 PM

Minor Periods

5:36 PM - 7:06 PM
6:37 AM - 8:07 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: 7:05 AM
Sun Transit: 12:43 AM
Sunset: 6:22 PM
Daylight: 11 hrs 17 mins
Moonrise: 8:15 AM
Moon Transit: 1:26 PM
Moonset: 6:30 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:40 AM - 3:10 AM
12:56 AM - 3:26 PM

Minor Periods

6:00 PM - 7:30 PM
7:45 AM - 9:15 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: 7:05 AM
Sun Transit: 12:43 AM
Sunset: 6:22 PM
Daylight: 11 hrs 17 mins
Moonrise: 8:15 AM
Moon Transit: 1:26 PM
Moonset: 6:30 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:40 AM - 3:10 AM
12:56 AM - 3:26 PM

Minor Periods

6:00 PM - 7:30 PM
7:45 AM - 9:15 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: 7:06 AM
Sun Transit: 12:43 AM
Sunset: 6:20 PM
Daylight: 11 hrs 14 mins
Moonrise: 9:23 AM
Moon Transit: 2:14 PM
Moonset: 6:58 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
1:44 PM - 4:14 PM

Minor Periods

6:28 PM - 7:58 PM
8:53 AM - 10:23 AM

Action Rating: 4 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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