Water Temperature of the Rock River in Byron, IL

Current Water Temperature

72.5°F

Measurement Time: Friday, September 11, 2026, 4:15 AM 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

70°F
Sunny
Sunny
63%
SSE 5 mph
57°F

Weather Forecast

Sunny
Today
81°F - Sunny
Partly Cloudy
Tonight
60°F - Partly Cloudy
Mostly Sunny
Saturday
84°F - Mostly Sunny
Partly Cloudy
Saturday Night
54°F - Partly Cloudy
Mostly Sunny then Slight Chance Rain Showers
Sunday
77°F - Mostly Sunny then Slight Chance Rain Showers
Chance Rain Showers
Sunday Night
54°F - Chance Rain Showers
Chance Showers And Thunderstorms
Monday
80°F - Chance Showers And Thunderstorms
Showers And Thunderstorms Likely
Monday Night
64°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Tuesday
79°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Tuesday Night
54°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday
76°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday Night
57°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Thursday
79°F - Showers And Thunderstorms Likely
Slight Chance Rain Showers
Thursday Night
54°F - Slight Chance Rain Showers

Astronomical

Sunrise: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 40 mins
Moonrise: 7:05 AM
Moon Transit: 1:18 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:48 AM - 3:18 PM

Minor Periods

6:49 PM - 8:19 PM
6:35 AM - 8:05 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: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 40 mins
Moonrise: 7:05 AM
Moon Transit: 1:18 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:48 AM - 3:18 PM

Minor Periods

6:49 PM - 8:19 PM
6:35 AM - 8:05 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: 6:33 AM
Sun Transit: 12:53 AM
Sunset: 7:13 PM
Daylight: 12 hrs 40 mins
Moonrise: 7:05 AM
Moon Transit: 1:18 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:48 AM - 3:18 PM

Minor Periods

6:49 PM - 8:19 PM
6:35 AM - 8:05 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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 8:16 AM
Moon Transit: 2:03 PM
Moonset: 7:41 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
1:33 PM - 4:03 PM

Minor Periods

7:11 PM - 8:41 PM
7:46 AM - 9:16 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: 6:34 AM
Sun Transit: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 37 mins
Moonrise: 8:16 AM
Moon Transit: 2:03 PM
Moonset: 7:41 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
1:33 PM - 4:03 PM

Minor Periods

7:11 PM - 8:41 PM
7:46 AM - 9:16 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: 6:35 AM
Sun Transit: 12:52 AM
Sunset: 7:10 PM
Daylight: 12 hrs 34 mins
Moonrise: 9:24 AM
Moon Transit: 2:48 PM
Moonset: 8:04 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:18 PM - 4:48 PM

Minor Periods

7:34 PM - 9:04 PM
8:54 AM - 10:24 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: 6:35 AM
Sun Transit: 12:52 AM
Sunset: 7:10 PM
Daylight: 12 hrs 34 mins
Moonrise: 9:24 AM
Moon Transit: 2:48 PM
Moonset: 8:04 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:18 PM - 4:48 PM

Minor Periods

7:34 PM - 9:04 PM
8:54 AM - 10:24 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: 6:36 AM
Sun Transit: 12:52 AM
Sunset: 7:08 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:33 AM
Moon Transit: 3:34 PM
Moonset: 8:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:04 PM - 5:34 PM

Minor Periods

7:59 PM - 9:29 PM
10:03 AM - 11:33 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: 6:36 AM
Sun Transit: 12:52 AM
Sunset: 7:08 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:33 AM
Moon Transit: 3:34 PM
Moonset: 8:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:04 PM - 5:34 PM

Minor Periods

7:59 PM - 9:29 PM
10:03 AM - 11:33 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: 6:37 AM
Sun Transit: 12:52 AM
Sunset: 7:06 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:40 AM
Moon Transit: 4:22 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
3:52 PM - 6:22 PM

Minor Periods

8:28 PM - 9:58 PM
11:10 AM - 12:40 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: 6:37 AM
Sun Transit: 12:52 AM
Sunset: 7:06 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:40 AM
Moon Transit: 4:22 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
3:52 PM - 6:22 PM

Minor Periods

8:28 PM - 9:58 PM
11:10 AM - 12:40 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: 6:38 AM
Sun Transit: 12:51 AM
Sunset: 7:05 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:45 AM
Moon Transit: 5:11 PM
Moonset: 9:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
4:41 PM - 7:11 PM

Minor Periods

9:04 PM - 10:34 PM
12:15 AM - 1:45 PM

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: 6:38 AM
Sun Transit: 12:51 AM
Sunset: 7:05 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:45 AM
Moon Transit: 5:11 PM
Moonset: 9:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
4:41 PM - 7:11 PM

Minor Periods

9:04 PM - 10:34 PM
12:15 AM - 1:45 PM

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: 6:40 AM
Sun Transit: 12:51 AM
Sunset: 7:03 PM
Daylight: 12 hrs 23 mins
Moonrise: 1:46 PM
Moon Transit: 6:02 PM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
5:32 PM - 8:02 PM

Minor Periods

9:47 PM - 11:17 PM
1:16 PM - 2:46 PM

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: 6:40 AM
Sun Transit: 12:51 AM
Sunset: 7:03 PM
Daylight: 12 hrs 23 mins
Moonrise: 1:46 PM
Moon Transit: 6:02 PM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
5:32 PM - 8:02 PM

Minor Periods

9:47 PM - 11:17 PM
1:16 PM - 2:46 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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