Water Temperature of the Rock River in Byron, IL

Current Water Temperature

32.0°F

Measurement Time: Friday, September 25, 2026, 4:30 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

56°F
Partly Cloudy
Partly Cloudy
92%
E 5 mph
54°F

Weather Forecast

Partly Cloudy
Tonight
48°F - Partly Cloudy
Mostly Sunny
Saturday
68°F - Mostly Sunny
Mostly Cloudy
Saturday Night
50°F - Mostly Cloudy
Partly Sunny
Sunday
68°F - Partly Sunny
Partly Cloudy
Sunday Night
50°F - Partly Cloudy
Sunny
Monday
70°F - Sunny
Mostly Clear
Monday Night
50°F - Mostly Clear
Mostly Sunny then Chance Rain Showers
Tuesday
70°F - Mostly Sunny then Chance Rain Showers
Showers And Thunderstorms Likely
Tuesday Night
58°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday
68°F - Showers And Thunderstorms Likely
Rain Showers Likely
Wednesday Night
59°F - Rain Showers Likely
Rain Showers Likely
Thursday
70°F - Rain Showers Likely
Chance Rain Showers
Thursday Night
54°F - Chance Rain Showers
Chance Rain Showers
Friday
69°F - Chance Rain Showers

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:48 AM
Sunset: 6:49 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:14 PM
Moon Transit: 12:00 AM
Moonset: 5:34 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

5:44 PM - 7:14 PM
5:04 AM - 6:34 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: 6:48 AM
Sun Transit: 12:48 AM
Sunset: 6:49 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:14 PM
Moon Transit: 12:00 AM
Moonset: 5:34 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

5:44 PM - 7:14 PM
5:04 AM - 6:34 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: 6:49 AM
Sun Transit: 12:48 AM
Sunset: 6:47 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:36 PM
Moon Transit: 7:33 AM
Moonset: 6:44 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

6:06 PM - 7:36 PM
6:14 AM - 7:44 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: 6:49 AM
Sun Transit: 12:48 AM
Sunset: 6:47 PM
Daylight: 11 hrs 58 mins
Moonrise: 6:36 PM
Moon Transit: 7:33 AM
Moonset: 6:44 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

6:06 PM - 7:36 PM
6:14 AM - 7:44 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: 6:50 AM
Sun Transit: 12:47 AM
Sunset: 6:46 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:59 PM
Moon Transit: 1:08 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
1:08 PM - 3:38 PM

Minor Periods

6:29 PM - 7:59 PM
7:25 AM - 8:55 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: 6:50 AM
Sun Transit: 12:47 AM
Sunset: 6:46 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:59 PM
Moon Transit: 1:08 AM
Moonset: 7:55 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
1:08 PM - 3:38 PM

Minor Periods

6:29 PM - 7:59 PM
7:25 AM - 8:55 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: 6:51 AM
Sun Transit: 12:47 AM
Sunset: 6:44 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:26 PM
Moon Transit: 1:56 AM
Moonset: 9:09 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
1:58 PM - 4:28 PM

Minor Periods

6:56 PM - 8:26 PM
8:39 AM - 10:09 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: 6:51 AM
Sun Transit: 12:47 AM
Sunset: 6:44 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:26 PM
Moon Transit: 1:56 AM
Moonset: 9:09 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
1:58 PM - 4:28 PM

Minor Periods

6:56 PM - 8:26 PM
8:39 AM - 10:09 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: 6:52 AM
Sun Transit: 12:47 AM
Sunset: 6:42 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:48 AM
Moonset: 10:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
2:52 PM - 5:22 PM

Minor Periods

7:29 PM - 8:59 PM
9:56 AM - 11:26 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: 6:52 AM
Sun Transit: 12:47 AM
Sunset: 6:42 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:59 PM
Moon Transit: 2:48 AM
Moonset: 10:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
2:52 PM - 5:22 PM

Minor Periods

7:29 PM - 8:59 PM
9:56 AM - 11:26 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: 6:53 AM
Sun Transit: 12:46 AM
Sunset: 6:40 PM
Daylight: 11 hrs 47 mins
Moonrise: 8:41 PM
Moon Transit: 3:45 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
3:50 PM - 6:20 PM

Minor Periods

8:11 PM - 9:41 PM
11:13 AM - 12:43 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: 6:53 AM
Sun Transit: 12:46 AM
Sunset: 6:40 PM
Daylight: 11 hrs 47 mins
Moonrise: 8:41 PM
Moon Transit: 3:45 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
3:50 PM - 6:20 PM

Minor Periods

8:11 PM - 9:41 PM
11:13 AM - 12:43 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: 6:54 AM
Sun Transit: 12:46 AM
Sunset: 6:39 PM
Daylight: 11 hrs 44 mins
Moonrise: 9:34 PM
Moon Transit: 4:45 AM
Moonset: 12:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
4:52 PM - 7:22 PM

Minor Periods

9:04 PM - 10:34 PM
12:27 AM - 1:57 PM

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: 6:54 AM
Sun Transit: 12:46 AM
Sunset: 6:39 PM
Daylight: 11 hrs 44 mins
Moonrise: 9:34 PM
Moon Transit: 4:45 AM
Moonset: 12:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
4:52 PM - 7:22 PM

Minor Periods

9:04 PM - 10:34 PM
12:27 AM - 1:57 PM

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: 6:55 AM
Sun Transit: 12:46 AM
Sunset: 6:37 PM
Daylight: 11 hrs 42 mins
Moonrise: 10:39 PM
Moon Transit: 5:47 AM
Moonset: 2:02 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
5:55 PM - 8:25 PM

Minor Periods

10:09 PM - 11:39 PM
1:32 PM - 3:02 PM

Action Rating: 2 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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